Malicious PDF — malware analysis report

Static analysis result for SHA-256 bac35ed94c86efb6…

MALICIOUS

PDF

83.3 KB Created: 2021-09-18 18:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0f2b9c6146fb977cc120cd42057fa0b0 SHA-1: c9ccad5c5e38e155d6482c29407568edf2c2ea2a SHA-256: bac35ed94c86efb6472e110fa2b9aa0191b7293510b9bfa60f9545d671457bb7
156 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 designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of external URIs and the overall structure point towards a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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.
  • 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 https://allytemp.ru/uplcv?utm_term=free+download+amazon+prime+video+mod+apk PDF link annotation
    • http://minerva-collection.net/files/files/wavulokejuvib.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/64212142090.pdfIn PDF document text
    • https://oykufestivali.com/ckfinder/userfiles/files/20477688264.pdfIn PDF document text
    • https://bibonatura.hu/ckfinder/userfiles/files/tifupevorimitu.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613840b292d51---78471346288.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1614111f9d1310---zulavireworogalosuwomef.pdfIn PDF document text
    • http://homeopathyhk.com/files/59159728689.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/48291683783.pdfIn PDF document text
    • http://studiobonvino.com/userfiles/files/sakenaboru.pdfIn PDF document text
    • https://gobelsprofil.com/upload/files/18517577427.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/bumirovegez.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/32962751720.pdfIn PDF document text
    • http://polletnv.be/uploads/files/96664203193.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/6173d44095b85337785438ed5938b4ec/78835814925.pdfIn PDF document text
    • http://thomasgearon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12847634749.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/gixutimilo.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210905204438.pdfIn PDF document text
    • https://ascii.tn/web/cgi/file/91216018446.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/86585889362.pdfIn PDF document text
    • https://vicareyou.com/userfiles/file/46627675699.pdfIn PDF document text
    • http://softwaretesting.kr/club/data/userfiles/file/20210910201714.pdfIn PDF document text
    • http://xinyuemu.net/assets/202109/files/20210903053807980625.pdfIn PDF document text
    • http://xn--j1aii.su/userfiles/file/demivobunejawuluna.pdfIn PDF document text
    • http://dorinhawear.com/admin/fckeditor/editor/filemanager/connectors/php/fckeditor/editor/filemanager/connectors/php/userfiles/file/minawejevigiro.pdfIn PDF document text
    • 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_off0000e0d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EB 10568 bytes
SHA-256: 473a813ce071e107680a12f1943bf7e736a7f2bd0684e75463c6b5eb2338e0cd
font_02_sfnt_off000110f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F9 18208 bytes
SHA-256: 1bf0e1d12da490af63c7b4fe88bbaa82cafdfc5d5066b6879b6820355b527bbf

Open this report in the interactive analyzer, or submit your own file for analysis.