Malicious PDF — malware analysis report

Static analysis result for SHA-256 6001b938e5767958…

MALICIOUS

PDF

72.6 KB Created: 2021-02-17 15:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 174f0971296c5cd5dd4413fb964dac9f SHA-1: cf2cda59c00838ae0aac4dcbfdd76345f5840eef SHA-256: 6001b938e5767958e36e487764287efe112a751f28f5b319472471f6903d53d7
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 it is part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly indicate a campaign to distribute malware or phish credentials through a network of linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://maypoin.ru/strik?utm_term=how+do+you+hook+a+portable+dishwasher PDF link annotation
    • https://cdn.sqhk.co/vusutazomaga/dvljgKr/basketball_jersey_clipart_black_and_white.pdfIn PDF document text
    • https://cdn.sqhk.co/nixibaraje/1jfAieg/turbo_racing_3d_hack_mod_apk_unlimited_money.pdfIn PDF document text
    • https://rixukiwifezi.weebly.com/uploads/1/3/5/3/135392959/2335279.pdfIn PDF document text
    • https://cdn.sqhk.co/kanemili/lWihlln/puzefitinimofiko.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefoveniri/ijjcmhe/dimubamanegakenem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393515/normal_60188584efd12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495985/normal_5fe3eeb4dac64.pdfIn PDF document text
    • https://cdn.sqhk.co/sururezog/whikvL6/9214257526.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/YNNieu8/60728370664.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/dagupefesoxuxenuja.pdfIn PDF document text
    • http://wajiletum.epizy.com/alcatel_pixi_4_8063_firmware.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/bluetooth_exe_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/android_emulators_for_windows_7.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF7 5404 bytes
SHA-256: b4f995d7d8a3e6ce288ff88bb553b67893276eddfdb888f1687dc3352492d929
font_01_sfnt_off0000f25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25B 10468 bytes
SHA-256: c7b08672e28fa41d8e77541ce8a17747b444d942286e6156567763a2eed039e6

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