Malicious PDF — malware analysis report

Static analysis result for SHA-256 f96f04a2d944172e…

MALICIOUS

PDF

82.6 KB Created: 2021-08-14 23:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: c245c280f234b0251c6b8682c8abf31c SHA-1: 590e07b5b86da29f05dda96c14c48915d0c2b678 SHA-256: f96f04a2d944172e089ee83b557b178e25be55dcadbe6e5799be06c58cdec793
176 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute further malicious content. The presence of multiple external URI heuristics and link farm indicators reinforces the conclusion that this document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796c42d0207---jiloborovamezewibubo.pdf In PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/8cb056ca338223db224c3cdabb3dabfe/14241519571.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/61664651092.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/7970866975.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/387ddb40d9929300bbdb67f6b2235ebc/97473765645.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607020633a0fa---vavapuroxuzuju.pdfIn PDF document text
    • http://peaceinsrilanka.lk/ckfinder/userfiles/files/webezimus.pdfIn PDF document text
    • http://climtech.com/files/files/xakibotutilolev.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/al24eei4erkablkehc857mefqb/bemavawekovekepewepuse.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/41fddc19df184d1a499e5cf1a642f627/79700863595.pdfIn PDF document text
    • http://qytbearing.com/upfile/file/sijilo.pdfIn PDF document text
    • http://cisseo.net/userfiles/files/mubepesipijoredox.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/0svgalmacuavt18jctrubudv4c/13888916868.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/lajapivevo.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/94603884843.pdfIn PDF document text
    • https://tigaintan.com/contents//files/68725451533.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a097b6394a9---36668945649.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/zekogugaruzogafexi.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/f0834d3328027f386792eb55b283ba74/rebiditirefujita.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/debonutomajalu.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc3d4b44b48---nirizebotoverafosexedum.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/f009d2b0dc3e525cced1cf9c2a50907c/14920104347.pdfIn PDF document text
    • http://onlinetradeshow.ir/uploads/files/6793084344.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210617231111164.pdfIn PDF document text
    • http://quaretti.it/userfiles/files/xaxudotexe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=king+arthur+movie+worksheet+answersPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA3 17572 bytes
SHA-256: d50e7a8fb6ad96745fe192f110dcc2ce1938e8b32e6655041b7d44f72857c2ac
font_01_sfnt_off00010b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123AA 10844 bytes
SHA-256: ba22957e9063670efc3905463f1fd5dad0f1e11ef48e878e9fb049ed6e79b1f3