Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b9771e29a7bc5e0…

MALICIOUS

PDF

119.5 KB Created: 2021-07-24 00:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c3269f47b2f8b785e37ae52069fbe37f SHA-1: c564bf801eeab8b1d3a476ebd8ea0aceb77204bb SHA-256: 2b9771e29a7bc5e04a935044e35081351bcc8d11ceec6d3cb7d94cd47de5bd8b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with PDF-based phishing lures designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35b22d79f9---vevukigobaxozenolele.pdf
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a19a4461fcf---jaletemevurakaterenoxuse.pdf
    • http://mega-treid.com/userfiles/files/977038937.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/pi2jt08ic8g59o8qji7vp6k756/kinonipuvunarekexuwuja.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160764083a42c7---99214379302.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/othcc1dh1kc60pmoo3679a419o/pejadevarovotimutorenugas.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cd2b0f1b5a0---bepedipoxugomevawe.pdf
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607196f4913f5---vojevafamewe.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087788d3dd1d---buxagoxexew.pdf
    • https://izr.fr/files/lotatasozipiben.pdf
    • https://thefertilizerequipment.com/d/files/61926222254.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c97e7f3dcd---kuxebopuxuwokizegamojon.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16082f12aa9fbc---barixuweziz.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ce3884600---zabupatosalapagakebojogev.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608550e3c7cea---rutugaziregejaliwut.pdf
    • http://metabolit-plus.ru/files/file/11897255777.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ocsrmgvgsghj7pk5npolai80i1/xefowaletofisuxasetikosaf.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a374dde4220---41990090003.pdf
    • http://bmcnx.com/userfiles/file/wijudevegebej.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e66fdb6f1---21774020502.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16070bf472840c---nubenakuwiximebepukub.pdf
    • http://vstarmp.cn/upload/files/20210706_102558.pdf
    • http://kpdb.org/userfiles/files/14380717797.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=the+aims+of+argument+a+text+and+reader+8th+edition+pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016c1c.bin
8f1eb9dc3e9934c6b4ec6936ceff27956a657cd2d5911abc7aa716012fd5630a
pdf-font-stream PDF embedded font (sfnt) at offset 0x16C1C 11272 bytes
font_01_sfnt_off0001863c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1863C 16792 bytes
font_02_sfnt_off00019e4e.bin
b19e8a1add40b096fc6d3a2e69644b223f6075ec689d668df4dbffe6a6db43ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x19E4E 18420 bytes