Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2b9fc62f7ec6fa2…

MALICIOUS

PDF

68.5 KB Created: 2020-11-22 01:23:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 0261e127cee620db738e932f11a76e65 SHA-1: 00d546e626396248e8c3d12c998698801aab629c SHA-256: b2b9fc62f7ec6fa2d0e067fa3553d67cb5f696c11c7bc735d8bb8e33c5fd242a
156 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection tactic. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing or trojan variant. While no scripts were directly extracted, the nature of the embedded links and the heuristics strongly indicate a malicious intent to redirect users to potentially harmful sites.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffe.ru/123?utm_term=the+100+season+7+episode+10 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393208/normal_5f972fbdea65e.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/jixidused.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424378/normal_5fb623c853b38.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/pagabasijepulesetiga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f44fa0a2-e60f-4032-bc37-12c282169e97/67087460086.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/cs6529-2_vtech_phone_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03e39087-dda7-4e2d-ab1e-43da2bdf1c63/85049450320.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/53601055922.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/92154374985.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/aprilia_rs4_125_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/advanced_mathematics_problems_and_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/sobimisawus.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/75423702058.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/la_caida_del_imperio_romano_de_oriente.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/online_buying_behavior.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/30831566669.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_off0000d058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD058 5144 bytes
SHA-256: 3b1e11e4660dcc2464c504e98f2855a29ba1cd82d0b67d0a3dc96a4374cca903
font_01_sfnt_off0000e1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E2 10340 bytes
SHA-256: 86a927c71980a3cc5ef6c618e6e9ea31158cf8c8a78c36963750b2d4ea70e20a

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