Malicious PDF — malware analysis report

Static analysis result for SHA-256 8671c371e36124f5…

MALICIOUS

PDF

71.5 KB Created: 2021-02-16 06:15:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 13a6f2243eb33379318277458694db40 SHA-1: 56289faa1c6cfb00955db43fb49efbe56a256c2c SHA-256: 8671c371e36124f5a9dac054ac2f7bda42d9a6ffcbf4dae7b5aae28744f080b7
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 URI pointing to 'bologen.ru', which is likely part of the attack chain. The document body, though heavily obfuscated, suggests a lure related to 'girl names', which is a common tactic in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=what+girl+names+start+with+e PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450501/normal_5ff697ce2a0be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495686/normal_6004d374d81ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422879/normal_6025b08ddff7b.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/jeii4jg/forest_deer_live_wallpaper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447630/normal_601c95d2309bf.pdfIn PDF document text
    • http://reduslimitaly.website/answers_to_questions_about_the_nfipns9l4.pdfIn PDF document text
    • https://cdn.sqhk.co/tubawonidas/rjbxhbm/cold_patches_for_fever.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497695/normal_600221aebd8ae.pdfIn PDF document text
    • http://vekifurusib.22web.org/mivemukonemapumawuso.pdfIn PDF document text
    • http://bigowet.xyz/sailor_moon_capitulo_173nbrxr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463807/normal_5fd642fedd43a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445532/normal_5fc9c920802a0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zugoxovok.epizy.com/neniriporizuvadefege.pdfIn PDF document text
    • http://xiwezolemamu.rf.gd/xokesatejejojixozoze.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_off0000dc75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC75 5204 bytes
SHA-256: b15665dca56b13c7b011c9155e9f98c471f452a43c8062c3a20c4b76f6d6da54
font_01_sfnt_off0000ee14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE14 10268 bytes
SHA-256: e1f106a7216ab617c7f723e2c8f16db614833cda66093f1a34ca97569dfecbce