Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0396618fd5c9ad…

MALICIOUS

PDF

81.3 KB Created: 2021-02-20 11:45:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6de27e60440440a5d6b9d6ab7837dbae SHA-1: 6f1878246f036a267a2d4468cca2ea5049c73ef5 SHA-256: ab0396618fd5c9ad8b81154ccd2385282dae337ec2f2f966e28125ed31a56c35
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' and an ML classifier indicating maliciousness. The presence of numerous embedded URLs, many on disposable hosting and some with UTM parameters, suggests a phishing or link-farming attack pattern. While no scripts were explicitly extracted, the PDF structure and URL distribution strongly indicate a malicious intent to redirect users to potentially harmful sites.

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://leonvi.ru/strik?utm_term=what+does+halligan+tool PDF link annotation
    • https://cdn.sqhk.co/teduwugevoki/qjfKjij/weekend_at_bernies_meme.pdfIn PDF document text
    • http://fdvsefwfrw.space/zalixejevorinedifidu37ylo.pdfIn PDF document text
    • https://cdn.sqhk.co/wekonexiw/jfsMINw/53006727541.pdfIn PDF document text
    • https://cdn.sqhk.co/pimepojuti/ajdnVFk/korean_heart_emoji_iphone.pdfIn PDF document text
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/gerolupo.pdfIn PDF document text
    • https://guxumexowe.weebly.com/uploads/1/3/3/9/133999944/5760760.pdfIn PDF document text
    • http://shopwithsale.website/petsafe_wireless_containment_system_rechargeable_collargtzvt.pdfIn PDF document text
    • https://mujekakuvegaxum.weebly.com/uploads/1/3/2/3/132303245/fezorumedu-bevuputofexa-zutipavepugurob.pdfIn PDF document text
    • http://fly-drive.online/vocals_only_maher_zainoqjq2.pdfIn PDF document text
    • https://dariwatipizodaf.weebly.com/uploads/1/3/5/3/135323996/petenepoj_zilubodukobez_zuwakewiruvuva_pumogajirinok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tawaxinazaka.rf.gd/alcudia_boat_trip_to_formentor.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/install_sql_server_2016_management_studio.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001011a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011A 5004 bytes
SHA-256: 9aacde7863efdaa999e9928f98418b1e85cc4e062a4c1aa458b588838a80f5d5
font_01_sfnt_off0001122b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122B 11120 bytes
SHA-256: ad5db298ee2e62a434bd08159bd78499de73153c142e36310a326b44eff6a164

Open this report in the interactive analyzer, or submit your own file for analysis.