Malicious PDF — malware analysis report

Static analysis result for SHA-256 0493770e34df158e…

MALICIOUS

PDF

83.1 KB Created: 2021-04-07 14:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8720382c861c6a18d684bd82d5d92eca SHA-1: 149031b09add004a79b28ef7945daefef93cb40e SHA-256: 0493770e34df158ea9009d9b9507101cfd0aed53ed58e3a41fbc39034a22c08f
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 an external URI strongly suggests a phishing attempt to redirect the user to a malicious website.

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://nipisod.ru/wix?keyword=writing+exponential+functions+from+tables+worksheet+pdf
    • https://kasipuxatupar.weebly.com/uploads/1/3/5/9/135966953/robuxaliluga-ragobe-pujifosaxixore.pdf
    • https://cdn-cms.f-static.net/uploads/4475572/normal_60436a9298539.pdf
    • https://static.s123-cdn-static.com/uploads/4499005/normal_5fffc5eda7859.pdf
    • https://cdn.sqhk.co/nozedimasav/hbgek1D/gudupamukamubosowow.pdf
    • https://cdn.sqhk.co/sugumujozik/jqxyTjh/tiktok_news_april_2020.pdf
    • https://cdn.sqhk.co/petawelesup/Gmageic/premier_league_fantasy_gameweek_21.pdf
    • https://zumavoga.weebly.com/uploads/1/3/1/3/131383266/mipuji.pdf
    • https://bogekivusuwi.weebly.com/uploads/1/3/4/6/134604255/922138.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jivala/23499572643.pdf
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_cec44d78507b495ab1ee77250c92eca4.pdf?index=true
    • http://rizexabidi.rf.gd/arturo_escobar_pluriverse.pdf
    • https://s3.amazonaws.com/godewumazek/pogrom_oxford_dictionary.pdf
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_a55839c912b34a158a8abe91559f06cd.pdf?index=true
    • https://s3.amazonaws.com/fujadabez/47694404096.pdf
    • https://968bac2e-1409-45a7-bd11-2c37eba47390.filesusr.com/ugd/c81504_5cca9a20e18a45f08701fe63a95ce348.pdf?index=true
    • https://s3.amazonaws.com/vajefam/28349974566.pdf
    • https://e1cd7dcf-8988-4be8-9b1a-722367337987.filesusr.com/ugd/6203b9_efd3f3123e504bfabe8bf8c9bb1683a5.pdf?index=true
    • http://wupekoxufoxa.epizy.com/zupabet.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_off0001044c.bin
165913f9adeb9bfff530677645746d8e3c3d72cbdd823f610d4be2dd6c7c1140
pdf-font-stream PDF embedded font (sfnt) at offset 0x1044C 5944 bytes
font_01_sfnt_off0001187f.bin
a820e969b573f82b3706a5532870508b7fbf859763b4bb3dbd8f730a403660e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1187F 11272 bytes