Malicious PDF — malware analysis report

Static analysis result for SHA-256 6802136d21f1d639…

MALICIOUS

PDF

91.2 KB Created: 2021-03-03 18:46:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: adc9aa0b6e6bdc37378cb1519945998f SHA-1: cdd94223faa3445dc8c643007b9a54aa842bd4b1 SHA-256: 6802136d21f1d639eb98b005159894ee9c53569e1f81f503f76e2cb67b73a846
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, with one prominent URL pointing to 'https://mezovuduw.ru/wix?keyword=metal+slug+unblocked', suggesting a phishing or malicious redirection attempt. The presence of multiple external URIs and a link farm heuristic further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/wix?keyword=metal+slug+unblocked PDF link annotation
    • http://blockingscenery.com/80320848022w3dql.pdfIn PDF document text
    • http://item-get.top/cortisone_shot_acnerrs7o.pdfIn PDF document text
    • http://podipotekoi.ru/download_driverpack_solution_13r6dnf.pdfIn PDF document text
    • http://1eyvgo.xyz/zimodin1r1tn.pdfIn PDF document text
    • http://spencermcman.us/3609337774277ewh.pdfIn PDF document text
    • http://ravujonawugip.22web.org/kirby_star_allies_iso.pdfIn PDF document text
    • http://zespodsvetkoy.site/fijadenuxipixezupuk17yld.pdfIn PDF document text
    • http://reduslim-italia.website/fast_furious_10_movieo7ylf.pdfIn PDF document text
    • http://rankingcoach-seo.com/852887316435w02r.pdfIn PDF document text
    • http://bilkan.fun/emergency_room_technician_requirementsoeey2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jesebikalag.epizy.com/wedding_march_free_piano_sheet_music.pdfIn PDF document text
    • http://sefegotanekexe.rf.gd/baby_bjorn_bouncer_safety_harness.pdfIn PDF document text
    • http://notavopanugatog.epizy.com/marketing_mix_plan_template.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://scripts.sil.org/OFLIn 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_off00011064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11064 5220 bytes
SHA-256: 2ee56c13f900347c75ab05843a0a3af82cac16183031b5014109a67c8a0b6407
font_01_sfnt_off00012249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12249 12296 bytes
SHA-256: 135ee0ebf934a5b0f8d686de4544415ab50d50b69914f80d1204dbe747531582
font_02_sfnt_off00014af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AF4 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848