Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a0178a60ee7540c…

MALICIOUS

PDF

74.7 KB Created: 2021-03-14 20:51:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca2bd6f477e0b0423ddc008b7e67bb0f SHA-1: dbf528781cf5c3308ccec8bd67314ea6ef51a03f SHA-256: 9a0178a60ee7540ca4dc85267e51665dc30fae85ea0c60ab098e894b6a05991d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, identified by heuristics as potentially malicious and flagged by ClamAV. The document body, though heavily obfuscated, suggests a lure related to a book summary, likely intended to trick users into visiting the malicious URL. The presence of an external URI and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/wix?keyword=nothing+but+the+truth+summary+chapter+by+chapter
    • https://static.s123-cdn-static.com/uploads/4448536/normal_6003525964ccd.pdf
    • https://cdn-cms.f-static.net/uploads/4489733/normal_604b29659a2d6.pdf
    • http://fukuzowi.sportsontheweb.net/vimowudizixatuvusitekama.pdf
    • http://gakagebir.mypressonline.com/veterinary_assistant_certificate_programs_near_me.pdf
    • https://cdn-cms.f-static.net/uploads/4458628/normal_5fda52caba316.pdf
    • https://static.s123-cdn-static.com/uploads/4366050/normal_5fcc3a2b2724b.pdf
    • https://static.s123-cdn-static.com/uploads/4379500/normal_600546d9ed0d1.pdf
    • http://dotavulilego.mypressonline.com/scratch_programming_tutorials_for_beginners.pdf
    • https://static.s123-cdn-static.com/uploads/4449627/normal_6005055567678.pdf
    • https://static.s123-cdn-static.com/uploads/4482191/normal_5ff6127b2965d.pdf
    • https://static.s123-cdn-static.com/uploads/4374853/normal_5ff671474e8df.pdf
    • https://static.s123-cdn-static.com/uploads/4470389/normal_5fc8c7b7ee821.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/boxujetanonikuv/36773098135.pdf
    • http://duziroro.myartsonline.com/iata_country_codes.pdf
    • http://nejesezape.myartsonline.com/assam_rifles_recruitment_2020.pdf
    • http://juvusowupu.onlinewebshop.net/criminal_law_books_philippines.pdf
    • https://s3.amazonaws.com/padadutiseni/pararixob.pdf
    • https://uploads.strikinglycdn.com/files/2b19a41a-03c2-4581-b4e8-288cc3829bca/kaxitiriwopek.pdf
    • https://uploads.strikinglycdn.com/files/93366079-1d2b-48a4-8031-0f0f6c68801c/89694407523.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_off0000e365.bin
bb2bba1bdb0fd68877729cf75b8bba272137b271e58614e9f78e8afe2e923b52
pdf-font-stream PDF embedded font (sfnt) at offset 0xE365 5528 bytes
font_01_sfnt_off0000f610.bin
262982c60b6bdbfe3777a37ba77c995974da45f501147b5ffd4563ee0ce7e7a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF610 11020 bytes