Malicious PDF — malware analysis report

Static analysis result for SHA-256 28238c67a0b09051…

MALICIOUS

PDF

72.9 KB Created: 2020-11-24 13:30:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3009baa6e867d1a311db292dae7e5e33 SHA-1: 5d1ffabfa5d67c9f4d2965ea5e22416941ab10e1 SHA-256: 28238c67a0b090514d290a7afa585bafe6d3cabef9d28b6cc44d4b3ca9f6fbb2
162 Risk Score

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. It uses an urgency-based lure. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffmen.ru/strik?utm_term=rwby+fanfiction+jaune+betrayed In PDF document text
    • https://cdn-cms.f-static.net/uploads/4471488/normal_5fa92a747fc05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5f9ee020c88b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5f9304977bb4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_5f93a959dc8a0.pdfIn PDF document text
    • https://kiroteveve.weebly.com/uploads/1/3/4/3/134378898/2758077ca007842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458633/normal_5fb29d284f222.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d91b4c14-9162-4134-a2de-4880ffcc5a50/91950375993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c0648ab-37ab-4c69-8f0b-616cdf28f2b3/40141999863.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/avionics_certification_test_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d509e60-9eaa-4780-87ac-189e628e74bc/lekebuzekupoziw.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_off0000e1cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CF 5220 bytes
SHA-256: 1e9b5c4068cbbc451ce9939467b6de3d7210117584e549c9764e1568d08e2cf8
font_01_sfnt_off0000f3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BF 10440 bytes
SHA-256: bc2c2912c2bccfb07a96def8a0cb137b700059202f4006c2ebac9ad03654052c