Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b3bea0d638b4cf…

MALICIOUS

PDF

206.1 KB Created: 2021-06-28 17:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 5df9e0cac95dc9b79f481b4edb32cdfe SHA-1: 7b3f246befcc03d4202af7965a0e39f18a3d10cf SHA-256: 02b3bea0d638b4cf6bbde148025aa0b843e4accb48cd7882d4368cf9fbab4942
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress upload directories, suggesting it is part of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external URIs and the 'link farm' heuristic point towards an attack pattern designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/feteremafepimexi.pdf In PDF document text
    • http://interiorconsignments.com/media/file/jizirodafoxujotuwu.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b805a2e9a47---zafabekilexud.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ffa6557555---togobizu.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed6a8313e6---37331153343.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/wavuraduwakexizuf.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a771b4d71d---56797885662.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160acf18213ac0---soziperojerim.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ttqcm9rct15a2a06sbbrbck0i6/57781417046.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/sifotiwol.pdfIn PDF document text
    • http://elyriahigh1974.org/clients/0/05/052ab20d644b737728595af1a47b4450/File/ximefeturedisivexeruvazu.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/6a6eedefe1d1474d1acfa6708e7029a5/kinijunomakalutivefusugo.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/92901083335.pdfIn PDF document text
    • https://pacpartner.net/images_client//imagesfile/xoxusiv.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa06c8c03b---jituwabukiliwamesobulide.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/a5a0f572436765af0e59879c8750219a/72532156793.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/fosileridudadik.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/63793f646a33efe9b173d069fb4bf978/95400962193.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/fpquc8uebj20l8huks4ecknl92/gufoviwabutagusapifamo.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/9a8c3626ed44d268fa0c27810e886a8c/3803205520.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791a93a4795---gebige.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16098739bf096e---monapopomoxegikomowa.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bd826b7b6d7---womidonawojezozowex.pdfIn PDF document text
    • https://ecoretras.com/file/wegivuxuwod.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d06dbe2435c---kiwiw.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9f4d4453d---tumuwixuvuwigisakisix.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607082e6532cf---lotamitefosisudosojixiput.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=one+piece+ending+1PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E952 75552 bytes
SHA-256: 56bbab41e13bd5d0b5f690fe9fac48f0197687069b71b7999dc73dab902b11ca
font_01_sfnt_off0002b3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B3A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002cbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CBB3 16160 bytes
SHA-256: 27fa49ca30b1f57c6e4f8b99ad1f73ead7010ce1f191e20d716503af09158f46
font_03_sfnt_off0002e128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E128 19516 bytes
SHA-256: 85ce00bd89061473dbc7a8dcc2bc92ed01d3271fcabcc1d867c7a908a3b115d2
font_04_sfnt_off00031355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31355 10072 bytes
SHA-256: 351b48952c6c6f96a0d2bad5c31deb2cab694414b59d01cd6dc2acbecdcf0bc2

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