Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6d1a94e3e1298a…

MALICIOUS

PDF

70.6 KB Created: 2021-05-09 23:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acca8c4693cd91dc9159ade11e046d04 SHA-1: b4c6919d9d28b632641739ebff3a307035656f2e SHA-256: cf6d1a94e3e1298ad7b25c6f9232613b1530bd16c2349af1b48c8d126cae789b
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, suggesting a link farm or phishing attempt. The document body, though truncated and obfuscated, contains text related to becoming a real estate agent, which is likely a lure to direct users to malicious external sites.

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://jacksth.ru/strik?utm_term=how+to+become+a+real+estate+agent+in+el+paso+tx
    • https://cdn.sqhk.co/wezufunin/cifezgd/bbq_restaurant_rush_grill_food_cooking_standing.pdf
    • https://static.s123-cdn-static.com/uploads/4382784/normal_5fc86c16e3376.pdf
    • https://cdn.sqhk.co/turaxulefa/cWOjdje/rixon.pdf
    • https://niraniki.weebly.com/uploads/1/3/4/6/134662237/4623130.pdf
    • https://cdn.sqhk.co/dodamewope/jXBic6W/the_king_of_fighters_97_ultimate_match_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4427077/normal_6027241c62fad.pdf
    • https://sokirokesavosa.weebly.com/uploads/1/3/4/9/134901907/41228fa.pdf
    • https://cdn-cms.f-static.net/uploads/4426090/normal_606e7f159bd82.pdf
    • http://xobelijimuri.iblogger.org/napoxaw.pdf
    • https://cdn-cms.f-static.net/uploads/4404953/normal_6013a2ba748b3.pdf
    • https://cdn-cms.f-static.net/uploads/4487665/normal_603633345812a.pdf
    • https://cdn-cms.f-static.net/uploads/4418764/normal_605f6e9866170.pdf
    • https://cdn.sqhk.co/xovujiroveg/jcuhaxH/jesarosutuwi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://daralake.epizy.com/defensa_siciliana_scheveningen.pdf
    • http://wafowexo.epizy.com/luxuvaz.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_off0000d4fd.bin
f404217fdc9c74c35415206fe2aff04f16c736fc3c97421d71db4fcaa9c2da11
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FD 5512 bytes
font_01_sfnt_off0000e7b3.bin
8f8e7afb1f2de697d3b6d0ead3f328d64604a6f097f4c01f0a3d6aa974fb4d62
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B3 11136 bytes