Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ce887254eae285…

MALICIOUS

PDF

68.1 KB Created: 2020-11-13 23:48:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ce38dbbb46a1fdfb779adca868253ff4 SHA-1: bd1edf25d10f6c4f09e8faaa583d596e8a70c022 SHA-256: f5ce887254eae2852423bdef7d74757a4be307d77b036ce0fc1502971a24d044
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to suspicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or trojan distribution. The embedded URLs are likely used to redirect users to malicious sites for further exploitation.

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/aws?utm_term=itunes+for+samsung+chromebook PDF link annotation
    • https://sulidisige.weebly.com/uploads/1/3/4/3/134318683/4727790.pdfIn PDF document text
    • https://lagafuxomip.weebly.com/uploads/1/3/4/3/134347440/muxesudi.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/jamevuz-fepiwu.pdfIn PDF document text
    • https://zororoxuz.weebly.com/uploads/1/3/4/3/134309160/wirejuwewurewi.pdfIn PDF document text
    • https://kadefetu.weebly.com/uploads/1/3/4/4/134471860/musog.pdfIn PDF document text
    • https://lisevududotuwak.weebly.com/uploads/1/3/4/2/134265384/8a60ec29273d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385862/normal_5f8e56e949612.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/saloviganepepi.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/b9ae3d86-7032-4d35-89ab-77c49f0590b5/33181315330.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/86882043425.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/jupurakukasakasowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa0d54c-38de-442f-9610-261e6be8de90/mytv_app_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/68248865474.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/corporate_accounting_question_paper_2018.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_off0000cc45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC45 5404 bytes
SHA-256: bc2045c95ecfc2c9fa7df7a43c71f49e195acd722f93a0ff2e6e8c842305838a
font_01_sfnt_off0000de83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE83 10808 bytes
SHA-256: 04d4b0c81c0fdd4ba55f9f649a6f31d15402ee381442898c3ff53a55607b62f4

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