Malicious PDF — malware analysis report

Static analysis result for SHA-256 a598366ac78d0b3e…

MALICIOUS

PDF

80.9 KB Created: 2021-03-22 22:17:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f657ff0f7a885fd62bc5ee596e04cb3 SHA-1: 2dccc8b7bbafc2239dda9ce712403e6df682f2a3 SHA-256: a598366ac78d0b3e10b2adc7d7c8340d81f4ad81a7cf93dad632b57852456496
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically `https://dafemum.ru/strik?utm_term=myron+mixon+pork+injection`, suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/strik?utm_term=myron+mixon+pork+injection
    • https://cdn.sqhk.co/vujenibolo/qlwVqgh/hero_xtreme_200s_real_mileage.pdf
    • http://robertferrell.net/mandated_reporter_laws_floridadin5p.pdf
    • http://fosikukiwa.iblogger.org/bisurutojexa.pdf
    • https://cdn.sqhk.co/sirojenu/hgcjb9n/high_sea_saga_hack_apk_download.pdf
    • http://tublitalia.fun/listening_test_3_arranging_storage_answersgxt41.pdf
    • http://nikecortez.net/71708477440nvmgp.pdf
    • http://rometinanuk.iblogger.org/2498487108.pdf
    • https://cdn.sqhk.co/pefevepufi/09ygc21/vitojirijoturur.pdf
    • https://static.s123-cdn-static.com/uploads/4379236/normal_5ff7ffee037ea.pdf
    • https://cdn-cms.f-static.net/uploads/4407784/normal_601d3d89ef346.pdf
    • https://cdn-cms.f-static.net/uploads/4421764/normal_6057015aba1b3.pdf
    • http://bifokagomasema.iblogger.org/century_2100_tens_unit_replacement_pads.pdf
    • https://static.s123-cdn-static.com/uploads/4458148/normal_5fff0e58cb315.pdf
    • https://cdn-cms.f-static.net/uploads/4488592/normal_604c991b2b1f0.pdf
    • https://cdn-cms.f-static.net/uploads/4373511/normal_6056a905b4816.pdf
    • https://static.s123-cdn-static.com/uploads/4380869/normal_5fcd23d48b748.pdf
    • https://cdn-cms.f-static.net/uploads/4374519/normal_602d02c526c47.pdf
    • https://cdn-cms.f-static.net/uploads/4475397/normal_603f356643bba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/supefujoxopubu/tv_guide_tasmania_saturday.pdf
    • https://s3.amazonaws.com/sukobogixe/72937100004.pdf
    • http://giwofigu.epizy.com/ansiedad_depresion.pdf
    • https://s3.amazonaws.com/bizamesuwepe/zojufuxekado.pdf
    • https://s3.amazonaws.com/niwotipugonuvoz/manual_book_canon_eos_m100.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_off0000fd6e.bin
ea079fee1b5226f6e65ef4057eb96529ae37af7fa7ca72cc196bbfd32679971b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6E 4976 bytes
font_01_sfnt_off00010e6a.bin
3900412d61f556ddc371d78fc207e1a59c46f004c9540937831213b9e0ef9da5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6A 11352 bytes