Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b2fa42cef3f3a04…

MALICIOUS

PDF

218.2 KB Created: 2021-06-25 20:14:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 2f976fe8940cadec401f020567ed09cc SHA-1: c6fc738952f3e0b5c61a8a8e57dc2b004706a2ab SHA-256: 0b2fa42cef3f3a049563b1b26eef212c6b2a8427798585fc53cabf3acbf1e9de
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links pointing to compromised WordPress upload directories and SEO redirectors, indicating a phishing or malware distribution scheme. The presence of external URIs and link farms suggests the document's primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9326

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 https://archism.ru/uplcv?utm_term=is+siren+head+real+yes+or+no PDF link annotation
    • http://bpsstudio.hu/uploads/6759890556.pdfIn PDF document text
    • https://vieclambaohiem24h.com/upload/files/kavovolufelonedikun.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/kinisumijagaxofajemovusip.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/3cf0af4a8bf4e2420a4445851b5958bd/rarixuravekaw.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d50d55a2565---monisomusib.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/4466427248.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/b7lgih8e3b60gji5qav4uh9ik7/36772956877.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/7ffca6adde2c721e8b67bb2a181be10e/17078954149.pdfIn PDF document text
    • https://campermagazine.tv/public/file/buriniwutalatenakikibik.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/qvf0d20c3egbjfthvaig1f24po/3172358089.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/favajura.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/04d12a491cd9ddc0833f65a14e392021/15296180472.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/98375129193.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160b87c3b1521b---49128054552.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16099f400dc304---tufavopafetuzi.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac816c2db20---23697668593.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2341b470fd---61555423671.pdfIn PDF document text
    • http://www.bandungmesin.com/file/82651324666.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/823e5e1e552dc3d16fe798c458a31a6f/pivejevuwezoxudizubarika.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/8af3e5f413987b8f8e64225898099370/duviwinowuvage.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a521c65537---56192429131.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ae7a8da1e1bbff40920983f92cf950c3/lojejogagefare.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16075af4c3e9f8---gopodadesajitet.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/a8647e81006c9c72953573d7fa79cff5/sadirujolirimitepaxufir.pdfIn PDF document text
    • 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_off0002b94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B94F 10312 bytes
SHA-256: 36ef0809cdb9a485346f56c16abaa71669e7a7f5cf9a4e2b8c85a2c99b7e04c3
font_01_sfnt_off0002d06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D06B 21404 bytes
SHA-256: 9c1d1c412f41acb468a5c21142ce7b23af654b6f4e0d897dc1a26f74232ceee3
font_02_sfnt_off000307af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00031fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31FBD 12132 bytes
SHA-256: 8b71118a2ecb01102b4c4bea77378861d676c5158345c73709a894b9616c1725
font_04_sfnt_off0003443a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3443A 16112 bytes
SHA-256: a493cf14d42598d256b41302b6b737aafa7e6b0f151a2977567a5726682abbae

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