Malicious PDF — malware analysis report

Static analysis result for SHA-256 3568734738273b8a…

MALICIOUS

PDF

73.5 KB Created: 2021-05-24 18:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5274ca648131c7291bba444fd389aa05 SHA-1: d92e72ac7460dcb65995435f9dcc75effb5280fb SHA-256: 3568734738273b8a9a96d13641b1404c8a7c5f7e56fb77637cb86d55c7640da6
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f5753137b---jodesiwetimirasuvef.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ced1122198---8854204094.pdf
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/ojb26nfnfa7s9rdie7notcr5hb/86328491209.pdf
    • https://majorsagilekvaros.hu/uploads/file/98710557151.pdf
    • http://meble-tk.pl/userfiles/file/dekewovuzasemobitigeji.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e852eebbc---41478101710.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/af2dbbf28c079e7100efd381d8cb1e36/bapirirazikirelawuxe.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/8mfd6dnh3iclkpnh1q1hs38hju/70752613145.pdf
    • https://manuscripthandler.com/userfiles/file/35076997119.pdf
    • http://baaningdoi.com/file_media/file_image/file/89671968471.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/236672c158655b372398155c1ab13966/13462651108.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609abfbf287a5---jojebabulaxofijiw.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4d9466869---pikifovurubotubo.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/q49sriu6ut78dklnk9p6pqjsa2/75843693455.pdf
    • http://talleresjpg.es/img/file/9742948913.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/252558ae1bf73c4f3d6aeffd6578ca4c/32299233543.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/q264cd7mdq6cb5ecusrjlkm0lh/xovovikuzixekerus.pdf
    • https://afayl.com/userfiles/file/jevelulafugagajokatezo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=chicago+tornado+siren+-+roblox+id+code
    • 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_off0000df13.bin
d00442f229c8417f754130f186ed6699c3f89ad91fe68a82d75aa320834a297a
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF13 5348 bytes
font_01_sfnt_off0000f13a.bin
967b3257e8066906b32e53dc23ed16905c9838f0f07e3df1681b7fc56f4f1f03
pdf-font-stream PDF embedded font (sfnt) at offset 0xF13A 11792 bytes