Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e45fcc532a33cb…

MALICIOUS

PDF

74.7 KB Created: 2021-05-31 22:20:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae6fd1a18b246e7fe80d597bdb11dcfd SHA-1: 7f675e06a4b1fb6b9d36434c78b68fdf2a9be925 SHA-256: 59e45fcc532a33cb37776c8afa3f583470118b4dc1bd484a1bd904512cbe9a84
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with the primary one being 'https://cructi.ru/pbw?utm_term=harrington+plastics+catalog+pdf', suggesting a lure to download further malicious content. The document body, though heavily obfuscated, contains metadata related to its creation, reinforcing the idea that it is a crafted lure rather than legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://cructi.ru/pbw?utm_term=harrington+plastics+catalog+pdf
    • https://cdn-cms.f-static.net/uploads/4374360/normal_5fd3573534c19.pdf
    • https://xolavubapipivuk.weebly.com/uploads/1/3/5/3/135302485/8517420.pdf
    • https://cdn-cms.f-static.net/uploads/4368243/normal_605a0ed47fc80.pdf
    • https://cdn-cms.f-static.net/uploads/4462341/normal_6063a16821211.pdf
    • https://cdn-cms.f-static.net/uploads/4393761/normal_60252015bc622.pdf
    • https://cdn-cms.f-static.net/uploads/4408995/normal_601cb74eaaff1.pdf
    • https://samarobiratepiw.weebly.com/uploads/1/3/5/3/135327643/dinesubupezusemi.pdf
    • https://fedalovojuxunod.weebly.com/uploads/1/3/0/7/130775560/c5eb752a1b1199.pdf
    • https://bilobunu.weebly.com/uploads/1/3/5/9/135969114/5926957.pdf
    • https://cdn-cms.f-static.net/uploads/4467612/normal_6069e82dcb2d8.pdf
    • https://wetuwisiw.weebly.com/uploads/1/3/4/4/134495793/xelowu.pdf
    • https://static.s123-cdn-static.com/uploads/4464067/normal_5fee4dc20bdff.pdf
    • https://sabopedawexidix.weebly.com/uploads/1/3/4/3/134305122/lugiwerama.pdf
    • https://cdn-cms.f-static.net/uploads/4481671/normal_60320b269a59c.pdf
    • https://ripafikumitepi.weebly.com/uploads/1/3/4/6/134622323/72ee0df827.pdf
    • https://momexifolel.weebly.com/uploads/1/3/4/3/134319719/waxabenan-fanedezari.pdf
    • https://static.s123-cdn-static.com/uploads/4410703/normal_5fdf2efc29bfe.pdf
    • https://tezogikezuvar.weebly.com/uploads/1/3/4/5/134584113/sapomoma.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://visetululiv.pbworks.com/w/file/fetch/144423078/ruwiwo.pdf
    • http://lekuzax.pbworks.com/f/gired.pdf
    • http://zilebunod.pbworks.com/f/4460111810.pdf
    • http://lakebimutep.pbworks.com/w/file/fetch/144419808/manual_al_quran_tagging.pdf
    • http://zilebunod.pbworks.com/f/5136403933.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_off0000e603.bin
2b0751376b21932399205461fcbf40ab76fc6afd4941fd3347081784579971ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE603 5284 bytes
font_01_sfnt_off0000f80e.bin
faddb33f2fa22c69b45f2c066dee675dd967c34a5692b10ea30564b727418c54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF80E 10780 bytes

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