Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad110b488c5485e…

MALICIOUS

PDF

106.8 KB Created: 2021-05-03 11:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 38c3186318d9d0b46af51d7c5ea8e3d1 SHA-1: 939ec2ab79f692f648da65d01efd089a9a03b4c6 SHA-256: 6ad110b488c5485ecf88a19793186352858d4df1d5039c31c9f41f196dbcc54f
184 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a malicious intent to redirect users to potentially harmful websites. The ClamAV detection and ML classifier further support its malicious nature, suggesting it is a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7093

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/strik?utm_term=at%2526t+-+el51203+dect+6.0+expandable+cordless+phone+system+manual PDF link annotation
    • https://tituwuvosaladu.weebly.com/uploads/1/3/4/8/134849885/9255773.pdfIn PDF document text
    • http://ttttrrrr.space/how_does_the_doctor_account_for_lady_macbeths_behaviorc1l6y.pdfIn PDF document text
    • https://pufodafu.weebly.com/uploads/1/3/5/9/135959320/noxewolanepe-gofibel-medimiguv-bebuxavowax.pdfIn PDF document text
    • https://xegavepixax.weebly.com/uploads/1/3/1/4/131452872/zesiw.pdfIn PDF document text
    • https://torufiwatus.weebly.com/uploads/1/3/5/3/135312416/domutat.pdfIn PDF document text
    • http://monstergym.ru/fokewipidoza69xyn.pdfIn PDF document text
    • https://sitimewodojex.weebly.com/uploads/1/3/1/8/131856527/jirofadoj.pdfIn PDF document text
    • https://buvedanazifom.weebly.com/uploads/1/3/4/8/134876279/lodewujo.pdfIn PDF document text
    • http://1xbet-football.fun/diono_radian_rxt_expiration_date_canadai3q5d.pdfIn PDF document text
    • http://leaninrzpd.site/heart_of_galaxy_horizons_shipsp711g.pdfIn PDF document text
    • https://rofofomigedug.weebly.com/uploads/1/3/4/4/134486696/tinedukoveg.pdfIn PDF document text
    • https://noremovex.weebly.com/uploads/1/3/4/8/134883944/6883346.pdfIn PDF document text
    • https://mizunemaki.weebly.com/uploads/1/3/4/8/134850414/4164834.pdfIn PDF document text
    • https://jaduxopedarev.weebly.com/uploads/1/3/4/7/134749363/nowolojofox-meliru.pdfIn PDF document text
    • http://evromotors.net/niwiwijozujolukonaxibewi6a5h6.pdfIn PDF document text
    • https://gorofegi.weebly.com/uploads/1/3/4/4/134462705/7c781b82244840c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_905901d2e2a0491a99840de854743ed4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pusori/what_does_f21_mean_on_bosch_washing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/how_did_the_internal_combustion_engine_impact_society.pdfIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_897ed7c9072e4de1a8e1b01cf95bd220.pdf?index=trueIn PDF document text
    • https://cdb53ace-3f3f-41e1-823e-0ecf3add8ba2.filesusr.com/ugd/47e9e0_22554f6ebf56454ca4a3c289d6e48cf0.pdf?index=trueIn PDF document text
    • https://be08d7d4-326a-4801-be9d-4496af17a43b.filesusr.com/ugd/d31907_4176b517996446818d07227f17510e27.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14826 7260 bytes
SHA-256: 3265b570b7d2b40a5c7e1b95ae9dd6107c3bc5a06799cae2d7a832cdf02a203a
font_01_sfnt_off000160ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160EC 4144 bytes
SHA-256: fc02dd8945052924da689f24daa8249a6b0a5d6ddc2ca787317cb0ae9dcccdfd
font_02_sfnt_off00016f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F0E 22244 bytes
SHA-256: a892b9dabef3fbc3973ec1437aa6c5433102ad4da552fad611f9d54e960943e0

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