Malicious PDF — malware analysis report

Static analysis result for SHA-256 32517ce217763efc…

MALICIOUS

PDF

74.9 KB Created: 2021-06-17 22:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbbd9dfea069c15585ece986ea0a6002 SHA-1: 7b65e13549c3fec3b474f271bd749e483d280b2b SHA-256: 32517ce217763efcca4042dd94cfd9750e09f12ec36ef14413258a57dc7fbd0d
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a003f519d6a---wofuxelir.pdf
    • https://allcreaturesinc.com/files/files/8721405724.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16070ff3582f38---gugarakizunonirimafopuw.pdf
    • http://kardelendalgicpompa.com/uploadfiles/file/guvujugibomexav.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b9b682e4e---pagug.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba2a9aadca---jizuxoxagutuzugubuwagon.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aaef0a48040---24258119085.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c2914275b09---godiwo.pdf
    • https://artasedanasingaraja.com/uploadfck/file/73031075730.pdf
    • http://dakhoanhanai.com/images/files/93964619276.pdf
    • https://szabobuszrendeles.hu/files/files/68316164205.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9214e23211---5477086274.pdf
    • http://www.mustwalge.ee/data/content/files/67854267505.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb2c2bcde7e.pdf
    • http://degrossier.nl/uploads/file/20970458139.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/4a4d9152d54f2c7fc7501b0e40a5bc0e/futimejubituruv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=church+business+meeting+agenda+template
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ea.bin
778eaec35afa4b0ab7965e2d4146dc3b804c1c71918e8801a2db17d59f6198be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EA 5532 bytes
font_01_sfnt_off0000fa81.bin
22b102916f49afcc4471000ac443245334d22fe6dfc3329f0e743faf8a7ff149		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA81 10472 bytes

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