Malicious PDF — malware analysis report

Static analysis result for SHA-256 54227857d439680c…

MALICIOUS

PDF

73.8 KB Created: 2021-03-17 15:51:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 432145b2cf8518df4ea0c74d5739d832 SHA-1: 156ba9a53c4f864c3cc7c5f8e6b88a02f6426c54 SHA-256: 54227857d439680c1d8fd10ec57edf3633c87f6660a99e5f01385488a756c4a9
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. ClamAV also detected it as a phishing trojan. The document body is heavily obfuscated, but the presence of the external URI suggests an attempt to redirect the user to a malicious site, likely for phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://vilenefex.ru/award?keyword=momordica+balsamina+pdf
    • http://waystep.site/91082376134hymrb.pdf
    • http://teachost.com/67590518557q6nw9.pdf
    • https://xomugiwonin.weebly.com/uploads/1/3/4/2/134266294/jaboduwulevado.pdf
    • https://static.s123-cdn-static.com/uploads/4481513/normal_5fddcb2c4f075.pdf
    • https://ganunosor.weebly.com/uploads/1/3/0/8/130814229/5369198.pdf
    • https://static.s123-cdn-static.com/uploads/4494166/normal_5ff532792dc81.pdf
    • http://kakerusejom.iblogger.org/46917720011.pdf
    • https://wikifepum.weebly.com/uploads/1/3/3/9/133986434/desekedoru.pdf
    • http://levantemosaic.com/94648239549l0u9g.pdf
    • http://fofikotopavabe.iblogger.org/44662004379.pdf
    • https://static.s123-cdn-static.com/uploads/4419437/normal_5fe227a6af4bd.pdf
    • https://static.s123-cdn-static.com/uploads/4387808/normal_60079fc9ebe8f.pdf
    • https://desagudag.weebly.com/uploads/1/3/4/6/134676200/7870915.pdf
    • http://bigmagazin.xyz/74686209973ju1id.pdf
    • http://gufutaca6.xyz/punugekirikazasewinexoqqz3v.pdf
    • https://dexutafabo.weebly.com/uploads/1/3/1/4/131453723/digipavinajota.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fitozupig.rf.gd/jizep.pdf
    • http://tepobibofa.epizy.com/40963249361.pdf
    • https://s3.amazonaws.com/kiwopusafize/81232576880.pdf
    • http://vawekofivujig.epizy.com/plain_journal_bearing.pdf
    • https://s3.amazonaws.com/xedewofuretujo/rutupifek.pdf
    • https://uploads.strikinglycdn.com/files/fb0ec661-5a47-4290-8e0c-38531f4af3d4/how_to_set_frequency_on_baofeng_uv_82.pdf
    • https://s3.amazonaws.com/tosevud/kitovowedojew.pdf
    • https://uploads.strikinglycdn.com/files/be438fff-aa8e-4161-95ee-a7430db21f6a/gegetirazevukeduj.pdf
    • https://s3.amazonaws.com/tuzamada/desudikulinejepis.pdf
    • https://uploads.strikinglycdn.com/files/2f300df9-7c91-446a-907b-a6f93b51f204/83111990806.pdf
    • https://uploads.strikinglycdn.com/files/567a776c-35be-419c-b687-e1c469e25776/eager_beaver_2014_chainsaw_parts_diagram.pdf
    • https://uploads.strikinglycdn.com/files/55730250-e8c1-4227-832d-27bc4e363add/craftsman_electric_chain_saw_14.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_off0000e07d.bin
cfde271673bd089b0b7b974086c0dc398eb4d86e3a4c8794013a5123c1f5003c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE07D 5448 bytes
font_01_sfnt_off0000f2f0.bin
2bfc96d9fc66c2bdd3eec94a59a2692848d810498000f7cb7ff66c4bb3726cd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F0 11780 bytes

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