Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d974cf40e688b1…

MALICIOUS

PDF

77.7 KB Created: 2021-03-01 22:03:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 357bc996ab81db4d36ac764b6082d5a0 SHA-1: 538eee248a85250c999fdb894367f1430edd77eb SHA-256: 02d974cf40e688b12abeea2607cf3a57d7bb6e34df91af4cd6582a739da19b3b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=how+to+study+for+teas+test+in+2+weeks PDF link annotation
    • http://apeech.ru/pawejifijemoxukegvc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455399/normal_5fe8d699c2e16.pdfIn PDF document text
    • http://trokot-tonirovka.online/zuxipefiparenenipl4h06.pdfIn PDF document text
    • http://duxeluwezix.iblogger.org/atmel_studio_6._2.pdfIn PDF document text
    • http://wigisosidika.22web.org/peter_lynch_one_up_on_wall_street_review.pdfIn PDF document text
    • http://reduslimer.website/nemebamomakekusudeugilh.pdfIn PDF document text
    • http://ig-objectionform.com/mini_block_craft_game_download_pcc98s6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446045/normal_6014fb94df778.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/msdart_windows_10_iso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476566/normal_6020aa0835734.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384029/normal_6006ef7131ac0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wojibikifi.myartsonline.com/7839226064.pdfIn PDF document text
    • http://rusilip.rf.gd/engagement_ring_buying_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/86704196629.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10C 5220 bytes
SHA-256: c29ced80885cbad407429b8e02ead10c049d53f1a29a094b2de6514a2fec7cdf
font_01_sfnt_off000102f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F6 11548 bytes
SHA-256: 8714815ea31f99b8ff9e0e295ba47a0b8ae8b4ffa47e7147c4c32ec1765c10ee

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