Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9d633f39f21b2e…

MALICIOUS

PDF

65.3 KB Created: 2021-01-19 09:47:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 6496484c757c8ef7c5cae34b2f09056d SHA-1: 71356dd4673c8f4667eb563e8dbdcc719ad0c019 SHA-256: 9f9d633f39f21b2e79fc0358bfb22644d038db600a6126a4fefe106297820a93
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, contains text related to a manual, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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
  • 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://traffset.ru/123?utm_term=ametek+thermox+2000+manual PDF link annotation
    • https://cdn.sqhk.co/lazaxosu/B9ieijl/dofajabosesivof.pdfIn PDF document text
    • https://cdn.sqhk.co/zomidami/RhcjfSn/motegamulaxanejisuwu.pdfIn PDF document text
    • http://bapipakaroxi.22web.org/hyrule_warriors_definitive_edition_guide.pdfIn PDF document text
    • http://fegebekuxew.22web.org/tozigotemepexefumuk.pdfIn PDF document text
    • https://cdn.sqhk.co/xugikokazo/cheHhiL/borap.pdfIn PDF document text
    • https://tujiniwiko.weebly.com/uploads/1/3/5/3/135350236/vuxepag_muwuletokil.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/tsXgjid/22022715442.pdfIn PDF document text
    • https://cdn.sqhk.co/juzurupivepo/fib7mcd/80s_r_b_love_songs_playlist.pdfIn PDF document text
    • http://wajuxerisowo.iblogger.org/nirafibekolifal.pdfIn PDF document text
    • https://cdn.sqhk.co/solumapidema/jjw51hi/pamosamaj.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/iBhdcnD/sewamo.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvurero/NchbEhf/popejof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zusunikumejimet.rf.gd/21580623167.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/senogesibasupulos.pdfIn PDF document text
    • http://vejesigivilowen.rf.gd/tizijiduvokefuwu.pdfIn PDF document text
    • http://miwufojo.epizy.com/convert_base64_to_in_angular_7.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/event_planning_website_template_wordpress.pdfIn PDF document text
    • http://vufagozujidivu.epizy.com/grid_paper_template_a4.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/case_study_file_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/tifowizidoba.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_off0000c529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC529 5140 bytes
SHA-256: 967eed6b2ea1c7905a2a624d6ce54c4a9cfd87e026528a86dd6629740803d98f
font_01_sfnt_off0000d673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD673 9852 bytes
SHA-256: 50904a0f123deb9a35face599b8389e471e163bb079b2f6bf841d9ef77e13cc2

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