Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dbbd359c966c636…

MALICIOUS

PDF

230.6 KB Created: 2021-04-09 23:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f0fc7eceea52a9a0b268c04d2277a429 SHA-1: 03fa6fe48d22620a62e8ab25b3cf605eaeec4b38 SHA-256: 8dbbd359c966c636876cd6e139ea5958dfeb49eb7f20b4b79c62649238e67e18
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a website impersonating a manual for an Onkyo receiver. This is a common phishing tactic to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://vilenefex.ru/strik?utm_term=onkyo+receiver+tx-sr705+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376601/normal_606a0ea558507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473053/normal_600e972762f6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366632/normal_5fc66479d56d3.pdfIn PDF document text
    • https://lipemegovaw.weebly.com/uploads/1/3/4/7/134766771/5382028.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373239/normal_6056168867abf.pdfIn PDF document text
    • https://tumazalewiguta.weebly.com/uploads/1/3/4/7/134755417/6772209.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420037/normal_604cb71255286.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rirusozo/4541240504.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/ejercicios_con_verbos_regulares_en_pasado_en_ingles.pdfIn PDF document text
    • https://96ea5dd8-6962-4d57-b29c-fb233a715e3b.filesusr.com/ugd/ac3463_dfafd62cdc034ff3ac5a6a3ddff16225.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/somanizuwukobogulew.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/86592963100.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/mitagusineramaragul.pdfIn PDF document text
    • http://jugikan.epizy.com/38788113019.pdfIn PDF document text
    • http://kaxixujupafa.rf.gd/remuwuzizudixubo.pdfIn PDF document text
    • https://db244590-af71-4c33-bd6e-2f8f55f31281.filesusr.com/ugd/fdab61_cc9d31723eb44f0daf3499e855e242e9.pdf?index=trueIn PDF document text
    • http://xojapenekoxij.rf.gd/37352170611.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/61736597978.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_off0003528d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3528D 5644 bytes
SHA-256: 62a7b99c6eb281d8e18c427967a9d21ace9e5c85e44e4f528f7fd82b170c8917
font_01_sfnt_off000365ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x365CE 11012 bytes
SHA-256: cc2a6b7e479e960af5c95d084e55b63476e03503b9899f66a1c1ba542c2c32fd

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