Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca52a61d73e0ce10…

MALICIOUS

PDF

77.0 KB Created: 2021-03-16 18:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25387050d237cb0876428483133b164a SHA-1: 1dd33026f155d3151e98f24355f036841f0cb61f SHA-256: ca52a61d73e0ce10ad3816f7ec0783aeaf3b5122934594902167657ceeaaf729
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'seumenha.ru' which is presented as a lure related to 'central nj craigslist free stuff'. This suggests the document's primary purpose is to trick users into visiting the malicious URL, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://seumenha.ru/wix?keyword=central+nj+craigslist+free+stuff
    • https://zibakuponitek.weebly.com/uploads/1/3/5/3/135303957/jajapawajupalow.pdf
    • https://cdn.sqhk.co/fowifabibu/gihLhfk/fugodomebelamokewe.pdf
    • https://pogunokele.weebly.com/uploads/1/3/0/7/130739789/nipurapewugalakamox.pdf
    • https://cdn.sqhk.co/difixoruze/Fjahhhh/xiwugudev.pdf
    • http://vinuwosozo.iblogger.org/aprender_a_desenhar_em.pdf
    • https://cdn.sqhk.co/pagozixupezi/b8yhUrQ/hume_bank_wodonga_address.pdf
    • https://cdn.sqhk.co/lexikegije/gQFjd32/aerosmith_pro_pinball_machine.pdf
    • https://cdn.sqhk.co/wunokebewoz/nsX7jbw/word_trip_level_492.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9b321a86-0615-40a7-b684-6dced782f4cc.filesusr.com/ugd/e3cae3_58128e950860460bbd9e2ec9089e4840.pdf?index=true
    • https://s3.amazonaws.com/tezofuretejom/aetna_medicare_provider_directory.pdf
    • http://rawopewudoj.rf.gd/62955937520.pdf
    • https://336ddc11-c37d-4cd6-9685-7accad2975f7.filesusr.com/ugd/479fa9_0734f39a3bf04cbda5916d3747d5b164.pdf?index=true
    • http://xapipapuvujefo.epizy.com/56022679083.pdf
    • https://s3.amazonaws.com/muwemivumazulax/56618869170.pdf
    • https://7605d98d-8b17-4a41-9383-f5c8d5af9bcc.filesusr.com/ugd/2bed4c_c1bcfbad9c7e4ee8901da5c24e82eacd.pdf?index=true
    • http://manuwebibu.rf.gd/welavogidisaxipomotefa.pdf
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_4d943610cd674d36aea4275693695e79.pdf?index=true
    • https://89d9876f-4e47-4433-ab5b-8da47ae3ae5c.filesusr.com/ugd/37c326_e8cfd46cf35d4db6ba1ccf88765b9bfa.pdf?index=true
    • 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_off0000f0a9.bin
b1c6af5175d9fda39ee0985a6d123f04a6e040de53c11570574ac49abf7a134b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A9 5028 bytes
font_01_sfnt_off000101d7.bin
0a72182ea94badeb9a5c4f935256016a1620084753725b33fd43fa5b80927f59
pdf-font-stream PDF embedded font (sfnt) at offset 0x101D7 10736 bytes