Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccce47c6cc8183e0…

MALICIOUS

PDF

66.8 KB Created: 2021-03-04 02:43:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6faef3aeda73abe62f3e4e650daf016b SHA-1: 545bcff7e76667803101be8b4a632a51cb4a7932 SHA-256: ccce47c6cc8183e0e919a1adf62e93e3589259c4100cbbd28c8b0ca3f8d88519
126 Risk Score

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. It contains numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains metadata related to job responsibilities, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=marketing+manager+job+responsibilities+resume PDF link annotation
    • https://cdn.sqhk.co/wiwokosokif/FigRAig/rafewagutoxumeg.pdfIn PDF document text
    • http://zekifafeter.scienceontheweb.net/fedex_customer_service_hours_usa.pdfIn PDF document text
    • http://evatopshop.xyz/plants_vs_zombies_1_paid_apkdkusy.pdfIn PDF document text
    • http://adanakebap.org/93461517423l9v3y.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisuvov/jgjsFdI/draw_me_a_star_eric_carle_activities.pdfIn PDF document text
    • http://ch-data-2a8fv9s.pw/veboluvatene2ndav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501998/normal_6040259947b73.pdfIn PDF document text
    • https://cdn.sqhk.co/vorowobenune/jhdjdhe/cracked_skyblock_servers_1._16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466140/normal_5fe1803c56ba2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408187/normal_5fecafdde74ea.pdfIn PDF document text
    • http://trylait.pro/pazobaredomemujogajoderu3frwg.pdfIn PDF document text
    • http://vinnipoh.fun/zadanenupojogibofismbvlg.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/Pigifjh/taguja.pdfIn PDF document text
    • https://cdn.sqhk.co/zokosofu/bvhdgjJ/85968674845.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD30 5304 bytes
SHA-256: 6fba00bd103493f64872f083b5bffcf466b634cd0e4e32aeb42687c0ed9d2860
font_01_sfnt_off0000cf27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF27 9592 bytes
SHA-256: d32536534644bde6a39337e183f7c89e8fb29cb9b7c9c8dd639b9b17904e4fb1
font_02_sfnt_off0000eff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF3 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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