Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2d31d8f70fbffe…

MALICIOUS

PDF

81.3 KB Created: 2021-09-19 20:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0f4eb8ec7c9aad4f5f27c51d26f6b857 SHA-1: e141a6338c1e5455881f4fb61bc0a464376037f4 SHA-256: 0e2d31d8f70fbffe0217b542209d73a75d3e0f43e73c102f8bc8c4eedeb1c1da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this. No scripts were extracted, but the overall structure points to an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://tanriovermensucat.com/uploads/genel/files/87708338826.pdf In PDF document text
    • https://flavio-tonon.it/public/file/tijuvodanidofogem.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/bkshijti6iuj1naveiagjbvmf0/buzovidexujo.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/202195_231333_619.pdfIn PDF document text
    • https://themalc.org/files/file/64348587183.pdfIn PDF document text
    • http://www.koeru.eu/failid/file/wapafejutiruvumoz.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/buremolutafebati.pdfIn PDF document text
    • http://dycelife.com/userfiles/file/zopoxurulevabikolad.pdfIn PDF document text
    • https://navoloki.mebel18.com/uploads/files/sirafogijavejoniwozomem.pdfIn PDF document text
    • http://evaemlak.com/userfiles/file///gawunuzux.pdfIn PDF document text
    • http://cofetariafraguta.ro/UserFiles/file/xilazogafan.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16132dad0b0deb---57543286655.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/zotutejaxavawilovumas.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e004a7e07---59448745969.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/bexevesoralorizesege.pdfIn PDF document text
    • http://incomsistema.ru/ckfinder/userfiles/files/31145401424.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/repuzaboxoxo.pdfIn PDF document text
    • http://insureavisitor.com/userfiles/file/37287514896.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/gaviguvinogagegokoxexiga.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/smj3urhge7u9iflg5mupu23q23/penelegawosudesixosa.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/gevivugapugawavuzebim.pdfIn PDF document text
    • http://www.pilatesyoga.hr/files/files/pumeduriwijafom.pdfIn PDF document text
    • http://asfalon.com/__files/file/xekavupenosipipugarata.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents/files/98346463111.pdfIn PDF document text
    • http://deshdunya.com/blogimage/file/nowosaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+sync+outlook+calendar+to+android+phonePDF 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_off0000d7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD0 17500 bytes
SHA-256: 929cb74f9a30c3767cfc98ec23b6cb498baba912d0cc5af565347b39ab362926
font_02_sfnt_off00011dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC4 10996 bytes
SHA-256: e7387e409af4aeded7729cad6a619636df8678c7da2dd780973d941812f31b80

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