Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b6a13659dc38106…

MALICIOUS

PDF

70.6 KB Created: 2021-02-21 04:23:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3515da7f64f54f5384f0aae3392bcd60 SHA-1: f37c1efb0263f257bc7b6e23638f8a65e6c4e8a8 SHA-256: 3b6a13659dc38106d3d02dfa9b1bc569e7d03e562c71dce935c6ff2294fc7a03
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://baarspo.ru/strik?utm_term=what+is+the+role+of+planning+engineer+in+construction PDF link annotation
    • http://pc-remont.website/guided_math_conference_20188ezhk.pdfIn PDF document text
    • https://cdn.sqhk.co/wafixagi/gvmoxgc/monkey_mask_movie.pdfIn PDF document text
    • http://love-cosmetics.shop/coragem_para_liderarkuszl.pdfIn PDF document text
    • https://cdn.sqhk.co/rirakibugo/dt0Lqig/73398833406.pdfIn PDF document text
    • http://forexgeeks.net/23382208672ev4fi.pdfIn PDF document text
    • http://migriruy.ru/homemade_ice_cream_maker_brandsr4qoh.pdfIn PDF document text
    • https://cdn.sqhk.co/tokebamojos/SDgfDgg/90723786842.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/dutimajizowa/kavumewenituw.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/treatment_of_attrition_of_teeth.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/75605105786.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_off0000d5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E0 5288 bytes
SHA-256: ac2d8cd4137e64637cc8a3f102b114b82d106c7e86652fcd8ea45043dcb71dc3
font_01_sfnt_off0000e7ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EE 10536 bytes
SHA-256: 9d70b799fae3f75ad9229839726fc49a871ed66ba126ef7c8b746d47f0d4cb1e

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