Malicious PDF — malware analysis report

Static analysis result for SHA-256 be02a3052d36f15b…

MALICIOUS

PDF

80.6 KB Created: 2021-09-06 10:08:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8ab49c15c948bf294aff3edde7d2ef6b SHA-1: 9a2c909f412fccb75393b6850fe15bef79b1889e SHA-256: be02a3052d36f15b40e22cc4ac93f2eb99936dd1d1cd06faa018f9081eac8b31
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://mfcwestenkwartier.nl/beta/userfiles/file/74787017944.pdf In PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160ede3e16ef67---tiwivifisaxubeka.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/1560701748.pdfIn PDF document text
    • https://enerjimakine.com/tsrm1/img/userfiles/file/butarinutajoma.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/76255410286.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/60699980107.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7bc854aefc---56091577968.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/4ee004666ea36df1e60251f1ba368086/98876195708.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/64144838699.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/62838099157.pdfIn PDF document text
    • https://tangentemag.com/img/file/xiroriwapi.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607545e783a57---24375560696.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085465bad53f---raradonebivakireduw.pdfIn PDF document text
    • http://archiwum.wyryki.eu/admin/ckfinder/userfiles/files/dizuvatakirali.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c64291e2ff8---88646872913.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/a56ecc057b335f121de94963b48435f5/levesabilofexiwa.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/0932b9296667870d3f9a30654d9e6e5c/sazewaruwekenivenozuvaf.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/98805389112.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/83102097534.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ek8lc9dfthostidgu1sv1i8ut4/88228012516.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16076656f8f288---rivovur.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/roxipojomibe.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160fbe2f79063c---ruxedilenosujurup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=cara+membuat+cv+file+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C9 17104 bytes
SHA-256: 67b10bf21944ad5b8c8f2ce94b1f9dfda10d865d232fb8dad14bd7ac382c3354
font_01_sfnt_off00010440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10440 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C57 10724 bytes
SHA-256: 2bd57b850aa64cd45cecddc5778d04ce41727d6ae061f03008f3213e1a86d4ab

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