Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eca3b4f3e9fb32e…

MALICIOUS

PDF

75.5 KB Created: 2021-03-12 07:09:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f56d03a08f0a9727b207dd38e5c8a5a SHA-1: 92c7d831cafec84faf339b50068e76f895a0ea12 SHA-256: 9eca3b4f3e9fb32e744f721a2c76cb0be283b4f2d02a29770693e671065a6780
96 Risk Score

Malware Insights

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

The 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://botokaw.ru/award?keyword=google+academico+tesis+pdf', suggesting a phishing lure disguised as a Google Scholar search result. While no scripts were explicitly extracted, the PDF structure and the nature of the embedded URLs indicate a likely attempt to redirect users to malicious sites for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/award?keyword=google+academico+tesis+pdf
    • http://esportzmlevent.com/what_is_end_stage_arthritis_of_the_shoulder5f1jc.pdf
    • https://cdn-cms.f-static.net/uploads/4477655/normal_5fd60e4dbc4a4.pdf
    • http://alphabitx.com/634327697863wag2.pdf
    • https://mefuwowenapes.weebly.com/uploads/1/3/4/6/134611128/7115846.pdf
    • https://tirokaroxere.weebly.com/uploads/1/3/2/7/132740449/6bdd039f33820c.pdf
    • https://cdn-cms.f-static.net/uploads/4469358/normal_601396cfae8e4.pdf
    • http://zufuruz.22web.org/33243880136.pdf
    • https://static.s123-cdn-static.com/uploads/4385633/normal_5fffe14774cc8.pdf
    • http://xixizugujixu.iblogger.org/game_counter_strike_pc_for_android.pdf
    • https://static.s123-cdn-static.com/uploads/4448113/normal_5fe18a7e8bd73.pdf
    • https://cdn-cms.f-static.net/uploads/4449779/normal_5fd909d290c20.pdf
    • https://cdn-cms.f-static.net/uploads/4445890/normal_5fd6293f9c1cb.pdf
    • http://iclod.tech/midorokod0pa2.pdf
    • https://cdn-cms.f-static.net/uploads/4491934/normal_600d0a8887632.pdf
    • https://vebexedupatad.weebly.com/uploads/1/3/2/7/132740253/tirariwukogije_xixelabaxoku.pdf
    • https://nifogagerosore.weebly.com/uploads/1/3/5/3/135300162/2661451.pdf
    • https://static.s123-cdn-static.com/uploads/4367019/normal_6003bb3ea2d95.pdf
    • https://static.s123-cdn-static.com/uploads/4373986/normal_5fc807b823e06.pdf
    • https://static.s123-cdn-static.com/uploads/4391954/normal_6000b2e76d5ea.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lewarojutuveg.rf.gd/affordable_housing_policy.pdf
    • http://vimiromomekex.epizy.com/cycles_worksheet_carbon_cycle.pdf
    • http://kepirodineloga.epizy.com/vizio_e600i-b3_weight.pdf
    • http://wafitiw.epizy.com/nursing_diagnosis_2020_list.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_off0000eb89.bin
f564278f3e8ca3bc08caef504b9923bcf1a3070d41a2a65e3540b69350a73788		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB89 5408 bytes
font_01_sfnt_off0000fde8.bin
22d909c3fe8159528a0202bd36bf32a278b470ac742aee641d59a9ebcb996315		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE8 10308 bytes

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