Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f248f4f073c2f9…

MALICIOUS

PDF

75.6 KB Created: 2021-05-25 12:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e598c1127413491dd4b6c1039b326ac6 SHA-1: 0268bd9c0736c55892e0ee77f03b79c67c42ea88 SHA-256: d0f248f4f073c2f938504867b2847d9774d95e195bb2213e79eb66fcb8a603b4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to car prices, likely intended to trick users into clicking malicious links for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8924

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://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f021bc846---50821409906.pdf In PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/02a129cff928c8308b382b4c3f429c31/77353243544.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/tq6gvuu20amud2e5apcmqflpem/sifofejenaxoz.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/202151172767244.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085375be52c2---womifas.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/ginizulepatanavibekup.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/295c4a7d6dae8895268a597f750e9b62/sevuwajo.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608022ce0d9e1---balumo.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/33790680249.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16086aa8bc0ff6---92079007024.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/9f2b01658141fa51dd031cf7d088cd21/nozanivifef.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/wonulunonewidora.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086c466762fc---banudiru.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/2b81e799acd7e97e19afef969fdb434f/posegokuniminutux.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/26282689031.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/d9ab9680aaacf42a23562565f5b20312/solumamulexudi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=toyota+hilux+revo+price+in+ethiopiaPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A3 5020 bytes
SHA-256: 175e414ae06dbac2caf38c577b5e596a4054497d1aca85d44bdd03de033d9b9e

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