Malicious PDF — malware analysis report

Static analysis result for SHA-256 6690ae475b506176…

MALICIOUS

PDF

92.6 KB Created: 2021-03-23 21:22:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05267f2883cfd59cd632edfe8a09aa46 SHA-1: 2e1711c9f1c80e2aa394cca1aa3e67d4b834de55 SHA-256: 6690ae475b5061768a2a6c386cde588c05aa6ebcc865d96063340f793736d7c0
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 URI pointing to 'dafemum.ru', which is likely the primary lure for the attack. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a date, suggesting it might be a generated document used to mask malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dafemum.ru/wix?keyword=a+small+car+2+unblocked+weebly
    • https://static.s123-cdn-static.com/uploads/4403689/normal_5fcda1d813ae9.pdf
    • https://cdn-cms.f-static.net/uploads/4382408/normal_60112541b842f.pdf
    • https://static.s123-cdn-static.com/uploads/4492555/normal_6004938ed5e41.pdf
    • http://detonic-official.website/kniha_pti_kruhzyv1k.pdf
    • http://xasunibi.iblogger.org/formcontrolname_vs_formcontrol.pdf
    • http://pressit.fun/biblical_archaeology_review_magazineo04g9.pdf
    • http://reduslim-siteofficial.site/wing_chun_kung_fu_freej906h.pdf
    • https://cdn-cms.f-static.net/uploads/4377403/normal_6012d4ad3e112.pdf
    • http://funasowuto.getenjoyment.net/tabla_de_auxiliares_en_ingles.pdf
    • http://nopezimugabotik.mygamesonline.org/how_deep_can_you_go_with_padi_advanced_open_water.pdf
    • http://creditchecktotal.info/importance_of_international_phonetic_alphabeto17me.pdf
    • http://madamzero.com/carnal_knowledge_and_imperial_power8ro8s.pdf
    • http://fuvisetitisenon.mypressonline.com/19415784669.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bamejovug.epizy.com/16009734022.pdf
    • http://zuxokoberibaw.atwebpages.com/buzzy_the_bumblebee.pdf
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_ade8fae7106445fc8de12233a0ace9c1.pdf?index=true
    • http://lidudoxodirabi.rf.gd/44084570862.pdf
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_4d1d291ad17343a3b5b76ed072628d5a.pdf?index=true
    • https://s3.amazonaws.com/vonuxagupeduze/19295090828.pdf
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_8543d4942e054f81941f9ab32283689e.pdf?index=true
    • https://s3.amazonaws.com/fotepopunaj/brain_gym_adalah.pdf
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_66d1dc39a6fb439399310f7185d7ee54.pdf?index=true
    • https://6762652a-e869-40f3-960d-1446d4066230.filesusr.com/ugd/55e6b1_2d8c0ddde1d04b04b64c8384ddd5dfb7.pdf?index=true
    • http://patepuxowibano.rf.gd/44121074327.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_off00012ab6.bin
f7dc074a90f4970b553bf3add9dffa2287f761d395833695ef4aff71011dc788		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB6 5604 bytes
font_01_sfnt_off00013dc1.bin
32f0f2f519df512c4b9c24ac6f59e0ac19df46e75301e9b13ec709bdbe3d75b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DC1 11656 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.