Malicious PDF — malware analysis report

Static analysis result for SHA-256 62e4642ddb80d900…

MALICIOUS

PDF

75.9 KB Created: 2021-04-07 03:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6125d96a4de0b139960dbc6c6989587 SHA-1: b102709b3a5690bd5c519d4a07f03e0525537f8b SHA-256: 62e4642ddb80d900b554245adbc2ccf39e03e4d4e29a3fcbc17252fe53da3280
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure strongly suggest an attempt to redirect users to malicious or deceptive content hosted on external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/strik?utm_term=is+the+wii+u+worth+it+2020
    • https://voxapuxunud.weebly.com/uploads/1/3/1/3/131381802/raruvimi.pdf
    • https://cdn-cms.f-static.net/uploads/4492275/normal_601aaf69e4237.pdf
    • https://cdn-cms.f-static.net/uploads/4479942/normal_603f174d7d34d.pdf
    • http://xomatisuxutu.iblogger.org/projeto_ararib_plus_geografia_6_ano.pdf
    • https://cdn-cms.f-static.net/uploads/4369905/normal_5fda84456a541.pdf
    • https://cdn.sqhk.co/gizoxemovefi/5JgeIif/20911908368.pdf
    • https://vemosesagegedow.weebly.com/uploads/1/3/4/3/134312783/3047074.pdf
    • https://fojugifobuko.weebly.com/uploads/1/3/5/3/135328464/5251061.pdf
    • https://sokijotebeveme.weebly.com/uploads/1/3/4/7/134767098/1114cd243db04d.pdf
    • https://cdn-cms.f-static.net/uploads/4463300/normal_601cfd4fe983f.pdf
    • https://cdn-cms.f-static.net/uploads/4496597/normal_6041baa71e81a.pdf
    • https://cdn.sqhk.co/minamojazi/TN0eiFj/93549793863.pdf
    • https://cdn.sqhk.co/ronelejibir/jtptigo/tatej.pdf
    • https://daxodewime.weebly.com/uploads/1/3/1/3/131398188/zobupazov-lotenekivobew-kisix-kosewuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vonikolodu.rf.gd/whats_bigger_9_16_or_1_2.pdf
    • https://uploads.strikinglycdn.com/files/9f398426-755e-483d-81c4-a7110420c031/1083995606.pdf
    • https://uploads.strikinglycdn.com/files/f600e636-06c5-42a0-8e04-6323cb355e89/wemiduzilajowozobi.pdf
    • https://uploads.strikinglycdn.com/files/dee7b72f-3f7a-4b99-be9d-bc93f3885d3a/19899833764.pdf
    • https://uploads.strikinglycdn.com/files/9f6b50f2-e376-470b-af86-ac7ad921dfe0/how_do_you_fix_a_honeywell_thermostat.pdf
    • https://uploads.strikinglycdn.com/files/d74186ee-3aac-4afd-adf8-1b6829033826/bob_double_stroller_car_seat_adapter_chicco.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_off0000ed23.bin
e9f75ff9fe39f523489373dff20c386e9dc5837f66eebbf60c9938ffa99dfcdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED23 4836 bytes
font_01_sfnt_off0000fda1.bin
f1a5f0a19b0d58347216342c02c33cc071c242482f6dc5219e088b6f65ef8c80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA1 10808 bytes

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