Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb5c9a05b325224b…

MALICIOUS

PDF

54.6 KB Created: 2021-07-02 04:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 33e9a23f49fa9e51ad4f09ae8ea5e79c SHA-1: 93d2d7bd623e97aca4310bd3b55119c9a80e1349 SHA-256: bb5c9a05b325224b74237e62933bbad8ae87e6a43358b98c8beff04ab984575d
154 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous external URLs that likely lead to phishing sites or further malware. The PDF structure and the presence of multiple distinct hosts suggest an attempt to distribute malicious content or redirect users to fraudulent pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5288

Heuristics 5

  • 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
  • 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://crewmak.ru/uplcv?utm_term=leftover+cranberry+sauce+coffee+cake PDF link annotation
    • http://chinocorporatechallenge.com/clients/6216/File/welirebabifusox.pdfIn PDF document text
    • http://healthywithhart.com/res/file/rorodurebewinigasudor.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/f4945b1c1f9a34d229f4256f049ea8d1/lozifidovinifibakawun.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/konutepenamijemopoz.pdfIn PDF document text
    • https://electroagro.es/pub/files/81744362773.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/abfdac9f4865ad70a194edb6d42c41b8/11547498343.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607273c1e7655---tilizuzojisomotar.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/fnjddv9pqd81f4qahbnbc1i8t0/23177743479.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072736e0ed9b---58335437295.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/pa5q2ist7165qrtb6n0kplu0si/12770135841.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/d7aa1e4c07dcb3642eab2635f1b97931/kewevuzeturimomiza.pdfIn PDF document text
    • http://hawks79.com/clients/85064/File/33183795451.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821869024e9---pikoliniv.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a15ffbcb814---62080509937.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/raredazu.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/vufax.pdfIn PDF document text
    • http://chongros.com/userData/board/file/jovodawudadijozuzirodupu.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/330cdbb04d4b758035836d179d8d0d4e/86419693323.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3473d50a6---11420275620.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/623aba6dea74ed0f9b9121ee1cb1c591/94903786814.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/retejifusipe.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a81aa093d4---2007346571.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2cbc20659---tizuzuwodesewovupe.pdfIn PDF document text

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