Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6f53674ae146f7…

MALICIOUS

PDF

75.0 KB Created: 2021-03-24 14:26:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79575e5bb5fadadad15f4a58aebdcda3 SHA-1: d80d7531a507043b8fc4313246ee744bf3d30f50 SHA-256: 3c6f53674ae146f7549d62e6465e726e341e38f72b66dec4709a64392444c9bb
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to potentially malicious or spam-related websites.

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://kuzutuzo.ru/strik?utm_term=what+is+the+best+mini+split+ac+unit
    • https://cdn.sqhk.co/pavujakorige/njhoEjr/barbecue_chicken_wings_near_me.pdf
    • https://cdn.sqhk.co/kominepoli/ifhdsgb/ice_princess_full_movie_disney_free.pdf
    • https://cdn-cms.f-static.net/uploads/4528876/normal_600c078e08b23.pdf
    • https://cdn-cms.f-static.net/uploads/4381544/normal_60546b947d8a7.pdf
    • https://liletalezawo.weebly.com/uploads/1/3/4/5/134591830/b73d7e939f.pdf
    • https://roguraluvi.weebly.com/uploads/1/3/0/7/130776180/458f06543d36d.pdf
    • https://narapafugoziror.weebly.com/uploads/1/3/0/7/130775848/5849540.pdf
    • https://cdn-cms.f-static.net/uploads/4368226/normal_603e2b45afc01.pdf
    • https://cdn-cms.f-static.net/uploads/4377113/normal_6041f010a45b5.pdf
    • https://cdn.sqhk.co/totuzilexif/hvhcWEP/zobuwa.pdf
    • https://cdn.sqhk.co/xavaxonad/gdtuNhg/gevuwujemunelepuza.pdf
    • https://static.s123-cdn-static.com/uploads/4393489/normal_5ffd2881c2460.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e0eedba4-cf99-4c42-97f5-d3f9ae5832dd.filesusr.com/ugd/e36ea7_afef33b3753742d6890c77bb35ea61dd.pdf?index=true
    • https://s3.amazonaws.com/jukoxisojow/heil_quietcomfort_86_oil_furnace_prices.pdf
    • https://s3.amazonaws.com/xarojapi/gebofe.pdf
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_1530ccb84b7d4d2f88fe7ac0cce9af5c.pdf?index=true
    • https://s3.amazonaws.com/fatisake/pupota.pdf
    • https://3dbd840c-7861-42b4-b064-af52d1d2f4eb.filesusr.com/ugd/86319b_622730a6334a43a2950f38220512af5f.pdf?index=true
    • https://s3.amazonaws.com/patilawasu/tulenuvigibemegu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e93f.bin
6d05c83837b182459fd3c96586c57b8092c586917ff670582971ace874db96f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE93F 5232 bytes
font_01_sfnt_off0000faf1.bin
b9b53a780e2f67e3620404c4f06e9f70b7190270ff62e859acc3db0e12168507		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF1 10588 bytes

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