Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2da3c90a40ea76a…

MALICIOUS

PDF

82.7 KB Created: 2021-02-14 05:53:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: dc633c3c20bd3529ed7d6dade34820ab SHA-1: b9e60cf58c3a6144ccbb06d7588423f3a141822a SHA-256: e2da3c90a40ea76a0f55e74c7de107cca5f36806c18a23f8a5e84b5ed8de1661
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as malicious by multiple heuristics and a machine learning classifier. The document body, though heavily obfuscated, suggests a lure related to 'running records assessment sheet' to entice users to click the malicious link. The presence of external URIs and the ML classification strongly 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://bologen.ru/123?utm_term=running+records+assessment+sheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4390373/normal_5fe04fa12fee9.pdfIn PDF document text
    • http://xujukega.66ghz.com/sasipuxemakotavokugin.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/wukunelotezomvwr7n.pdfIn PDF document text
    • http://megantv.site/george_adamski_booksk4ge1.pdfIn PDF document text
    • http://weinmvc.net/nuxanuxil1uj6.pdfIn PDF document text
    • http://enots.space/towafafigulorovawelobezos2nxc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468274/normal_601b7d2f91b91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5fd9cc4d2324a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473375/normal_5fd7cf253afe2.pdfIn PDF document text
    • http://awpmode.com/800265139946gyuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zugiwonurubenaz.epizy.com/formal_shoes_dark_brown.pdfIn PDF document text
    • http://tejovixija.rf.gd/85974719467.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/kujadanaxezixogeb.pdfIn PDF document text
    • http://kudawugijamino.rf.gd/riwubol.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/53898732344.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/nirasas.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/50431890097.pdfIn PDF document text
    • http://gusufarafedi.epizy.com/the_axial_skeleton_review_sheet_exercise.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC4 5328 bytes
SHA-256: 79d4c949aa99e867bd80d0843b16ca827ca108b5348680cff66b5972ccd2ba83
font_01_sfnt_off000100bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BF 11544 bytes
SHA-256: 7f33fdf205114da257f387a570f4c0e9b184db574d6a6d38026d88d4f2574cbd
font_02_sfnt_off000127b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B1 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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