Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea904ec45638b9a…

MALICIOUS

PDF

80.5 KB Created: 2021-03-15 08:59:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8e6994713fcdf57511c9e6748bdcb4d SHA-1: 754199500f71ac7db389c5a040e2c23943831df0 SHA-256: dea904ec45638b9a08e090081e21b431b749ceb836662cb83073b64ffbdeb469
96 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs that lead to other PDF files, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to "owners manuals online pdf", which is likely a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/award?keyword=owners+manuals+online+pdf
    • http://meinekarten.best/among_us_wallpaper_new_hd_android3gfno.pdf
    • https://sibufelaviwum.weebly.com/uploads/1/3/1/4/131438604/9420731.pdf
    • http://jejovonen.22web.org/chronic_renal_failure_ppt_free.pdf
    • http://drive4mclaneaustell.com/arabic_number_in_englishrznf6.pdf
    • https://cdn.sqhk.co/najuvotuwoz/0hhZIjg/metal_mail_drop_box.pdf
    • https://lufeziwupidel.weebly.com/uploads/1/3/5/3/135345985/203b4.pdf
    • http://theraisins.pro/34860735316s2uw4.pdf
    • https://cdn.sqhk.co/kadefowuvun/gctF1ih/tutonagebuzono.pdf
    • http://xrootunited.com/electron_configuration_and_orbitals_pogil_answersnjw9k.pdf
    • https://cdn-cms.f-static.net/uploads/4460471/normal_60340a5c1d6c7.pdf
    • https://xidekudogigut.weebly.com/uploads/1/3/4/6/134683706/menapodilene-libiki.pdf
    • http://secureappeal.com/mansfield_park_romanavrjid.pdf
    • http://jiwujat.iblogger.org/tojinetasegudup.pdf
    • https://mijutadozas.weebly.com/uploads/1/3/4/5/134590660/bda425442.pdf
    • https://silavetej.weebly.com/uploads/1/3/5/3/135314504/sogodetawatum-waredojave-bexusomusefu-faxiladupesid.pdf
    • https://cdn.sqhk.co/pezolaje/fidWhdp/57615828355.pdf
    • https://static.s123-cdn-static.com/uploads/4481163/normal_6007fb811d02a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://48936d5e-4b15-4059-a328-ddb12afcc15e.filesusr.com/ugd/173145_f12340e410a2490e8d615df15a7ce936.pdf?index=true
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_d1206fa2275d4c7bb6ac9bffeb3c13f6.pdf?index=true
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_bd0abb69087645eca6feca07f79eb219.pdf?index=true
    • https://fab88ded-2f12-46c9-b6ec-f290036286cc.filesusr.com/ugd/cce69c_ff2f552b495d486dbf061dfbb84c6df5.pdf?index=true
    • http://pafixorofabeza.epizy.com/67310124598.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_off0000fc5c.bin
8a67f99e15e2ae91f7c38c2671f6c693b1344d93c8682db8fd5ba8699e165fa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5C 5304 bytes
font_01_sfnt_off00010e5d.bin
f36db09b88905e49fb054c67513d25680b176a9e1e33b30da5a9f5e037c55a47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5D 11248 bytes

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