Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b932dc3207338f1…

MALICIOUS

PDF

67.0 KB Created: 2020-11-27 02:41:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f90f885fda49f17571b3c652cd499830 SHA-1: 23bf6a53585ba32071bef740d7ed825b15511716 SHA-256: 0b932dc3207338f1300b1c447ce91d8525509152e4b0b9912fd3c25900bfcd60
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafftec.ru/strik?utm_term=diary+of+a+wimpy+kid+2010+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501810/normal_5faf14cbc8806.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387565/normal_5f8d05540fe11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406806/normal_5fb840d638dc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380543/normal_5fa4403261442.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452624/normal_5fa215ea1e3f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369908/normal_5fa33e8126c0e.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/xotomisen/93068765560.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/murukivodeloludesonin.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/guzedetu.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/filexenadujuj.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/phimbathu.com_thai_lan.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_off0000c71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71D 5592 bytes
SHA-256: e0f3f87e75b7374b3aa1fa9c099fc640681ab00be623dee17683082702f8949a
font_01_sfnt_off0000da40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA40 10952 bytes
SHA-256: 8cdcecfc0af4a5807966e08528886376f677370601ddf5c24910cd3f2795623f

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