Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f0935a9c8d9827…

MALICIOUS

PDF

89.7 KB Created: 2021-07-26 14:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 25d6cbd1093e2ad157944ca7c567b49f SHA-1: f33ef8fcc29af83cd49ee5c9287eb93b6fc2ca49 SHA-256: f2f0935a9c8d9827bc40f4760e14028e8dd02ad097e88eb11b6951d0f4ff7619
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute further malicious content. The presence of external URIs and the overall structure indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160afe372cfb58---gepive.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/fca727ff9a95d7707f224376d3d78e98/97811978056.pdf
    • http://ahlhy.com/uploads/file/220825585927.pdf
    • http://hanifeugur.com/image/files/sufepakuniwavalu.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/tuchvh18nhn65426goorjfuju6/xevovevifepusul.pdf
    • http://stasta.com/userfiles/file/dewikepal.pdf
    • https://chasehr.in/userfiles/file/6603352787.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/4c34322571d99944b981ca8ee131251e/84462105450.pdf
    • http://vansuloi.com/uploads/userfiles/file/kanojozezadulukalenena.pdf
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9e91a69ab---87218397831.pdf
    • https://citrasas.com/ckfinder/userfiles/files/vuvokazonutuvubikafin.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/ed714be39eaf55a4a9be634bd873bd3a/82541833003.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160770dd8c694d---bowuzizexobuxeze.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/lo97ovv4q6jp5591ol24q8f4f7kjtm81/pojiseragakitasobiwuwokif.pdf
    • http://levne-pohary.cz/UserFiles/File/fetaratuf.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16080c80532e0c---kusedagezuxejesimimuxez.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/rj3q57rtkncc7770utolng01k6/79986127107.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/9qkgh0jpfffic4i929c5tl4rpd/95243795140.pdf
    • http://murielbellhomes.com/userfiles/files/34622400920.pdf
    • http://kppzp.pl/userfiles/file/55178342284.pdf
    • https://stdtekstil.com/upload/ckfinder/files/welujir.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=mad+max+fury+road+2015+full+movie+in+hindi+download+filmyzilla
    • 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_off0000f6e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E6 16792 bytes
font_01_sfnt_off00010efd.bin
9b249e8118f3f862f93d18080e9847b3e638a94c312e099054c39ed3b2e8c609
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFD 11304 bytes
font_02_sfnt_off00012985.bin
b1674cd851e1dcfdceae8620626df4836d09c766d2de8e93011dd500a7f5230b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12985 17608 bytes