Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ad60f9fb2e7a19…

MALICIOUS

PDF

93.8 KB Created: 2021-06-28 10:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d26d39a71803692a830af3133a18af1f SHA-1: a8e0491f2ee5c7ee839e1501f0dde68f90705658 SHA-256: 03ad60f9fb2e7a1953715aeea7d8416ac214e357de76128280e086811e1b6dee
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://activesolutionelectric.com/images/file/67496001774.pdf
    • http://www.celso.org/download/tapejisoponazewal.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b24f91e1e52---bubajufolexidigimijajapow.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/2e2367a165f6b8d5117b36a7af4a1113/mavikunawepa.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/04gkllvr8dj3bfp1r7j64t7rp0/wofonenunulufosojeviw.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/ah151juub2353b8fi99temr2g3/doxigoluw.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/m8ifv39fb6ai91juvobad1ti71/85504191376.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/f14def6c4b3696ffb9622cb461470ef0/gisadani.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082601e66519---78211129696.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16083b61e9376e---pafopowot.pdf
    • http://aire-limpio.com/img/editor/file/12913489027.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55c982465b---71481271452.pdf
    • http://ibtaker.ps/userfiles/file/40508361695.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/a9dfd0af422da55ebcb7777b7c81b543/fajebapefetuwofonadid.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6ef797d32---24798919772.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/920f8c1204b4e748b4e8ad06aa965c14/18576317170.pdf
    • https://bawwabatrizq.com/userfiles/file/55789222221.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0f9ed53d8---8510822240.pdf
    • http://homespakistan.net/magzine/uploadfiles/file/4548434232.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f4c11795e399e122f1f35158b96b4fd1/dezufipuxofused.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a46d96057---lugunonipobagukufivosupen.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5c8adce487bd46ab798f4e6992ec2993/zuserixum.pdf
    • https://bczenekar.hu/files/file/15751746059.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/5844cb4d479eb9199f6aee1ead8b8728/nixewuxifane.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=methotrexate+package+insert+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_off00010c7f.bin
2dac615b6f38d9661f71e1ec88a20f9f256ceb53fd8bfb5aad5e3e70cbe51d20
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7F 17016 bytes
font_01_sfnt_off00013887.bin
87b922f01d2c2bdd6932dfc1a244ea635f91a5ccaacb5959c102b20c68d301f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x13887 11040 bytes
font_02_sfnt_off0001520b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1520B 16792 bytes