Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3f7037d9bd9f748…

MALICIOUS

PDF

83.2 KB Created: 2021-02-20 19:09:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1e5a84e36ddbe20187ed93c48070e879 SHA-1: fb02ead5383011965be04302847cc650ebafb37a SHA-256: e3f7037d9bd9f748f7025968807655b7893c2285313921953b8547b9eb8e7b23
206 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing malware or conducting phishing. The document body, though heavily obfuscated, contains text related to training, which is likely a pretext to drive users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jottigo.ru/strik?utm_term=ccna+collaboration+training+in+bangalore PDF link annotation
    • https://cdn.sqhk.co/gawukale/hjCKghx/wodezabev.pdfIn PDF document text
    • https://cdn.sqhk.co/dibitarebizu/zbIjfig/nepim.pdfIn PDF document text
    • https://sulovuve.weebly.com/uploads/1/3/5/9/135973568/8245973.pdfIn PDF document text
    • https://cdn.sqhk.co/berirenike/cuugcLv/guia_juego_escape_impossible_revenge.pdfIn PDF document text
    • http://evromotors.net/gotalk_express_32_boardmaker_templatepqmgj.pdfIn PDF document text
    • https://nabaladeso.weebly.com/uploads/1/3/1/4/131438379/71387.pdfIn PDF document text
    • https://cdn.sqhk.co/feluxolid/tB5iesR/little_commander_world_war_2_tips.pdfIn PDF document text
    • http://cleaner360.shop/537918858696fea2.pdfIn PDF document text
    • http://chatik85939775.fun/fimeliwividupokopix2je6.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/hihajjU/40522752614.pdfIn PDF document text
    • https://cdn.sqhk.co/vitikitema/f0ifigp/super_games_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/ViezkDa/amtrak_schedule_san_antonio_to_los_angeles.pdfIn PDF document text
    • https://cdn.sqhk.co/zogameva/cf5y6ge/radoxinivapodabobitotopuj.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/gjqhi3z/all_ireland_coastal_rowing_championships_2019_results.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/hcjj2gh/greenleaf_cast_aj.pdfIn PDF document text
    • http://easylearning.space/kukomuxizurifidad4otif.pdfIn PDF document text
    • https://cdn.sqhk.co/vewimidipiv/iajgjf4/93054945379.pdfIn PDF document text
    • https://cdn.sqhk.co/susojitigi/3tIXhf4/86310195617.pdfIn PDF document text
    • https://mokazeke.weebly.com/uploads/1/3/1/3/131384082/danuta.pdfIn PDF document text
    • http://cardioactiveufficiale.site/epub_format_auf_kindle_lesen6jisy.pdfIn PDF document text
    • http://appless.space/what_is_harry_potter_book_1_aboutc3te4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000106d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D5 4832 bytes
SHA-256: 62bda046d75c7c39cbf9ac0a6d0341fb0e65e38f732da8e844c4e03a56fdcf3b
font_01_sfnt_off0001174f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174F 11676 bytes
SHA-256: 0a5b3a37ae70592be40c81824dde7e01ef28fb9ff2525f78247deb2f413593be

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