Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c68984f07c5d972…

MALICIOUS

PDF

73.2 KB Created: 2021-01-11 15:59:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0e196d0a6ce0f6f648d57799c4679fe4 SHA-1: 9db5ba02db1242afd50f305e1e4d918dc91df737 SHA-256: 6c68984f07c5d972243af745df8ea4d022d4bd8ffd2670f579629408b612abac
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable domains and are used in a link farm pattern, suggesting a phishing or malware distribution campaign. The presence of external URIs and the overall structure strongly suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/aws?utm_term=november+2018+calendar++word PDF link annotation
    • https://cdn.sqhk.co/gobuwovuv/tzXja8h/bmc_software_glassdoor_salary.pdfIn PDF document text
    • https://site-1175190.mozfiles.com/files/1175190/tic_tac_toe_python_minimax.pdfIn PDF document text
    • https://cdn.sqhk.co/lokalofobox/xSchiid/barbershop_movie_songs.pdfIn PDF document text
    • https://site-1197000.mozfiles.com/files/1197000/73708264706.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382948/normal_5fae23f338d1c.pdfIn PDF document text
    • https://site-1229354.mozfiles.com/files/1229354/modern_age_tattoo_piercing.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379217/normal_5fa008f39187f.pdfIn PDF document text
    • https://site-1171564.mozfiles.com/files/1171564/acellus_reviews_high_school.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368770/normal_5fc729ad26b58.pdfIn PDF document text
    • https://site-1177369.mozfiles.com/files/1177369/java_adventure_game_phoneky.pdfIn PDF document text
    • https://site-1168485.mozfiles.com/files/1168485/mafia_king_romance_books.pdfIn PDF document text
    • https://sugelama.weebly.com/uploads/1/3/4/8/134898925/6823816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425924/normal_5fdbab98b7767.pdfIn PDF document text
    • https://site-1166725.mozfiles.com/files/1166725/monster_truck_driving_games_online.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

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_off0000de49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE49 5688 bytes
SHA-256: 8762adbb0a313bb79fd6ea9b1413766a37cc0891cc75e9ae3f216616af2b4c6e
font_01_sfnt_off0000f1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A5 11700 bytes
SHA-256: 1f8a6451563d443b103ba39de970fdb89caa92b02b5ce78b9415209c1c275d7a

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