Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f185ee3c42c22b…

MALICIOUS

PDF

67.6 KB Created: 2020-12-25 19:44:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7afb3cc25280d803a9b34a92f60bdda2 SHA-1: eb8aebf39b9995698642dea8284fe290070126ef SHA-256: b9f185ee3c42c22be0342a074577158c5c7b618aab1cfb98d7a154d8f545c94e
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs to a suspicious domain, likely part of a phishing or scam campaign. The document body, though partially garbled, suggests a lure related to 'Word connect level 509 answers'. No scripts were extracted, but the presence of an external URI and the overall detection profile strongly indicate a phishing 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://trafffi.ru/strik?utm_term=word+connect+level+509+answers
    • https://cdn.sqhk.co/xubenijevewe/cPheqig/heroes_charge_burning_phoenix_7.pdf
    • https://cdn.sqhk.co/pujapipiwat/miivihu/99202661299.pdf
    • https://cdn.sqhk.co/supetuzitepi/hahe5gf/thoracentesis_medical_definition.pdf
    • https://cdn.sqhk.co/gurukemopuge/PxWgf3K/supimitol.pdf
    • https://cdn-cms.f-static.net/uploads/4416496/normal_5f970005d92fb.pdf
    • https://cdn.sqhk.co/febenanedibu/gejjjaD/mobagamodigejezatonujaki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sorogamat/fokizapawutupon.pdf
    • https://s3.amazonaws.com/lazolu/onicon_f3500_flow_meter_manual.pdf
    • https://s3.amazonaws.com/ribowexulo/87773244236.pdf
    • https://s3.amazonaws.com/zifilobesumafi/lowowojebid.pdf
    • https://s3.amazonaws.com/zuxime/biology_textbook_pearson.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_off0000cb5d.bin
3da5e81598b392654f069212f92c228a418688f1ebadc8a4eb24f20f1d047f4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5D 5520 bytes
font_01_sfnt_off0000de50.bin
0dcf51290091ba25b7eaa41abb688ad434e62170963a9f00aeaaf6eb7ca13939		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE50 10284 bytes

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