Malicious PDF — malware analysis report

Static analysis result for SHA-256 a96b0cbe599d3629…

MALICIOUS

PDF

69.6 KB Created: 2020-12-06 00:58:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7e19e13490342cf50555744ac2152ae9 SHA-1: daa117629b6fb42d67961e991108d574a1861e0b SHA-256: a96b0cbe599d362924d5a9c49bbef765c726d25c0e1a03c9057765773ba0806e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://trafftec.ru/strik?utm_term=deft+dodger+pathfinder PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368954/normal_5f896f8aaec0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493245/normal_5fc9bf2ec43af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388626/normal_5fa67da8a48b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378175/normal_5f9631f7b0a93.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/5deb7c8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454562/normal_5fa69bfb7c2b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_5f88b4b2703cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f87118f21692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444357/normal_5faa290ead84a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413110/normal_5fafb0b35e613.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/bending_moment_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/48956016300.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/87469690318.pdfIn PDF document text
    • https://s3.amazonaws.com/mewezekilafef/89497690329.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/datejitura.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/accounting_objective_questions_and_answers.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_off0000d5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BF 5092 bytes
SHA-256: d820d4bd14f75253346392ed08e374836d6b7a75802e464e93f9a9df380cd023
font_01_sfnt_off0000e714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE714 10252 bytes
SHA-256: 178036f1cbdd6ae8b1a68419e35724749946143a7fa83d9341a25ba60ac1cdfc

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