Malicious PDF — malware analysis report

Static analysis result for SHA-256 608f24e2354205eb…

MALICIOUS

PDF

71.2 KB Created: 2020-12-17 08:14:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d49e71f800e4937944b1a87f8cf92bb SHA-1: d70032bee2129557f0d46dcf2572bf18b35156b5 SHA-256: 608f24e2354205eb735588f0546d2e3eea27d54d76d7387fd537fe326a97fd8c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains a large number of external links, many pointing to PDF files hosted on Weebly and other platforms, suggesting a link farm or SEO poisoning tactic. The embedded URLs likely lead to malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=cube+world+fast+level+up+seed
    • https://zeburunonuf.weebly.com/uploads/1/3/4/4/134458398/gewelidexitube.pdf
    • https://xukanimuwuvam.weebly.com/uploads/1/3/2/6/132696198/6206643.pdf
    • https://sezitoxonuga.weebly.com/uploads/1/3/4/8/134886233/liviwonozotof.pdf
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/9273352.pdf
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5fb47214bee95.pdf
    • https://cdn-cms.f-static.net/uploads/4388276/normal_5f9db5206797c.pdf
    • https://cdn-cms.f-static.net/uploads/4384459/normal_5fd9a8339e17b.pdf
    • https://zupavuzinopaz.weebly.com/uploads/1/3/4/2/134265708/2e0a82e8543015.pdf
    • https://cdn-cms.f-static.net/uploads/4482648/normal_5fa75a4e4104e.pdf
    • https://cdn-cms.f-static.net/uploads/4373986/normal_5f96c5fb5e282.pdf
    • https://kogavoduwesexup.weebly.com/uploads/1/3/4/6/134600755/zufuwexupekix_zixodatiler_nipekedes_nujafakini.pdf
    • https://static.s123-cdn-static.com/uploads/4502721/normal_5fd043b3a2182.pdf
    • https://ritakixe.weebly.com/uploads/1/3/4/7/134745902/lagisa-dagizalog-zinax-razisoz.pdf
    • https://tixanesel.weebly.com/uploads/1/3/4/2/134234664/f192d48d15.pdf
    • https://cdn-cms.f-static.net/uploads/4425514/normal_5fbb4b9e620ac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static1.squarespace.com/static/5fcf08e1f07fd00950ddd8b3/t/5fd651af102ca46975e098ec/1607881138245/declaration_of_independence_break_up_letter_answers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccc5.bin
ced1df7a7e67d07773e1299e6c7b85e8e200442cdd6efbecb4105ec047172f2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC5 5076 bytes
font_01_sfnt_off0000de36.bin
bc38e56b3f9295cbbc704e520068abaaeb0f67fe9b4a6deacbf4a6a0c061f13f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE36 10572 bytes
font_02_sfnt_off00010200.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10200 4324 bytes

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