Malicious PDF — malware analysis report

Static analysis result for SHA-256 b137802b42bc8e72…

MALICIOUS

PDF

60.7 KB Created: 2020-12-21 05:35:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ba6bd2a6500f6505ff6e77c7fe1a4f00 SHA-1: 49fde64640f68b3851cd40848c78e5a8368982d6 SHA-256: b137802b42bc8e722c259cf27dbe1927e7d4089e4fec5733e482c0458c32ef8b
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 0.9994

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://traffnew.ru/strik?utm_term=battle+islands+ps4+tips PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375077/normal_5fbb31cb19730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416789/normal_5fae6757b0811.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f87129464af1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381980/normal_5fb751e43e161.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5fa407615a913.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446914/normal_5fdc397b3ed06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470542/normal_5fc0d36e4519e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f87a4c6555ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453105/normal_5fc9c93a1ce7b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pezofut/88508012972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cec8d152-2334-476b-99b2-2630c4d58506/68197942797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/836ac15a-7c9b-4421-8cf3-ef118ac22584/craigslist_mcallen_tx_car_parts_for_sale_by_owner.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9B4 4672 bytes
SHA-256: 086db4546b5f73b2ed4a7be5b3f2a3fd49a5c6005e622cfe34a1d272d7a7da30
font_01_sfnt_off0000b999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB999 8992 bytes
SHA-256: bae06a21b2a87ef9554667da790fd68e02a36a9e840c3c562617689be9bf82a8
font_02_sfnt_off0000d855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD855 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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