Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6d6223d85a44e44…

MALICIOUS

PDF

77.0 KB Created: 2021-04-05 02:20:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd5d29b742e9fa3d612879e68b037d15 SHA-1: de2fdc208b83b82aae8539afba6b3288c55f92e6 SHA-256: b6d6223d85a44e44b441e52b6fc8c3df55f4b53461da87c559be2081d61c55bc
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text related to 'Fallout 4 mods pc download', suggesting a lure to entice users to click on embedded links. The presence of an external URI pointing to 'crophysi.ru' further supports this phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/strik?utm_term=fallout+4+mods+pc+download
    • https://static.s123-cdn-static.com/uploads/4370778/normal_5ff290078a145.pdf
    • https://cdn-cms.f-static.net/uploads/4393785/normal_604e189ec0660.pdf
    • https://static.s123-cdn-static.com/uploads/4378410/normal_6005fb8567e92.pdf
    • https://static.s123-cdn-static.com/uploads/4463565/normal_5ff4da5548266.pdf
    • https://cdn-cms.f-static.net/uploads/4462696/normal_606a2dd4036d8.pdf
    • http://menudajuweka.22web.org/bengali_movie_panther.pdf
    • https://cdn-cms.f-static.net/uploads/4466368/normal_5fe6fb699bcee.pdf
    • https://cdn-cms.f-static.net/uploads/4466367/normal_60248bd28d297.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f1dc0d93-4628-47a4-a922-619fa15ef3ca/iomega_storcenter_ix2_manual.pdf
    • https://s3.amazonaws.com/rodakarugupoko/boy_scout_office_midland_tx.pdf
    • https://uploads.strikinglycdn.com/files/f8442180-271c-40c4-b63c-663749e62364/36715288348.pdf
    • http://pikejip.rf.gd/suxofixawu.pdf
    • http://tajiralilumes.epizy.com/83288962805.pdf
    • https://uploads.strikinglycdn.com/files/857c9ddf-106c-4f5a-9923-8b3bdd465867/tuvexalimonesafaso.pdf
    • https://uploads.strikinglycdn.com/files/fe7b56d9-350c-48a0-a590-68b1567212ab/56713748638.pdf
    • https://s3.amazonaws.com/muvemasoxaji/geared_turbofan_engine.pdf
    • https://uploads.strikinglycdn.com/files/f28d13b6-b702-41a4-a675-150be5ec6125/14453347416.pdf
    • https://uploads.strikinglycdn.com/files/1d7b09d0-f3d6-42ff-b270-8df30d9e09bc/gospel_centered_life_at_work.pdf
    • https://uploads.strikinglycdn.com/files/cfffe5dd-f638-45ec-8b44-24eb13f30a00/concepto_de_artes_visuales_forma.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_off0000eeae.bin
eeebe7c07a38c7e01d08521af88e8366fe18b02445486f204b6b40acdc109794
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAE 5256 bytes
font_01_sfnt_off0001009b.bin
d58ed7209f8d17b0c37ad50821907efd3030f3b8cd35593a9b736a01da3636ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x1009B 11328 bytes