Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9c6fccb60cc7aa4…

MALICIOUS

PDF

76.7 KB Created: 2021-06-17 10:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a2f7fa0454ae72270405ac44144b3c72 SHA-1: db1d1fed3e7aa34b02c5011d2eeb139dd22b0e79 SHA-256: d9c6fccb60cc7aa428266288209a755171833e3bc5e4f5cc95d05a04312a0809
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malware or conduct phishing. The embedded URLs, such as 'https://pixomot.ru/uplcv?utm_term=minecraft+1.17+apk+download+android', are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://pixomot.ru/uplcv?utm_term=minecraft+1.17+apk+download+android PDF link annotation
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160766c30665e8---wivuwoxeri.pdfIn PDF document text
    • http://sparan-art.ru/ckfinder/userfiles/files/52810408024.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607635bdc20fc---zisabetikonitel.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/ea9d3c67b2aead95e5be3018b21fa822/waxemanilokugapukom.pdfIn PDF document text
    • http://swadeministries.com/pastor-sammy/upload/imagecontent/file/nukewuwimoxa.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160945338d5138---puxuvul.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/27989cdf09e93651fd0a8ec2cd46c0af/18168142550.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/12922182801.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/temizir.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba3b9bc4cd---tuvijijufobebezedisogom.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/d865014ac86998f36bce4386967f1bda/60768377214.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/zogosodalarapufelexuzozav.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609195ec4cc4d---88457021238.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/98556788464.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1aa411b720---47235244017.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/gevevo.pdfIn PDF document text
    • https://isosklo.cz./uploads/88070147184.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFD 5296 bytes
SHA-256: 2236a872e99b66a95dbc47b290127634de557ff336870d968fcd454fd5c5f1da
font_01_sfnt_off0000ff49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF49 10812 bytes
SHA-256: 8d1cba81c8647abcd8a5cdafd29bf2d5b35d3464b8ef3114f5a65e90691570d0