Malicious PDF — malware analysis report

Static analysis result for SHA-256 f749be32d113e213…

MALICIOUS

PDF

81.5 KB Created: 2021-03-09 11:01:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c99c844ca168144e0e05983842b2cb37 SHA-1: 4c77146799f72e85e483f55b37154c9a825f6634 SHA-256: f749be32d113e213776dfa645f6b7fd8b931f84d242f73aadb7e6d4117cead1a
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic findings reveal it functions as a link farm, embedding numerous URLs pointing to disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://xezojetit.ru/aws?utm_term=self+reliance+lds+scriptures PDF link annotation
    • http://vataponuxizeliz.mywebcommunity.org/roku_error_code_003_comcast.pdfIn PDF document text
    • https://bimaruzo.weebly.com/uploads/1/3/4/5/134517483/5292677.pdfIn PDF document text
    • https://wusuritod.weebly.com/uploads/1/3/0/7/130739885/4132890.pdfIn PDF document text
    • https://cdn.sqhk.co/jipuwava/gchjjdH/19060540827.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/gjahcjh/gigalekukulifaj.pdfIn PDF document text
    • http://kudukudimox.sportsontheweb.net/what_are_the_two_visual_strategies_in_organizing_information.pdfIn PDF document text
    • https://cdn.sqhk.co/bezakebijuk/egdjdz6/cookies_must_die_last_chapter.pdfIn PDF document text
    • https://bifekanivixu.weebly.com/uploads/1/3/1/4/131408854/jogapinid-balikexejibu-rogokilemepa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491437/normal_5fcb0aa683d39.pdfIn PDF document text
    • http://wapadax.scienceontheweb.net/praise_and_worship_songs_2018.pdfIn PDF document text
    • https://bezuwodasufex.weebly.com/uploads/1/3/2/6/132696249/jirasikiloteze.pdfIn PDF document text
    • https://totakolexab.weebly.com/uploads/1/3/5/3/135391630/xufizofonizapu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423460/normal_5ff2563a11e3a.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/hgjbJgf/shooters_world_ccw_classes.pdfIn PDF document text
    • http://zekojotewakugag.mypressonline.com/formula_to_calculate_gdp_per_capita_growth_rate.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vubelifijam.atwebpages.com/persona_4_golden_achievements_steam_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/modal_verbs_of_advice_multiple_choice_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/pigazakop.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/how_to_report_fly_tipping_anonymously.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_off00010227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10227 5252 bytes
SHA-256: 2a99f6d9199fad2ac48de09643a074b5860e7f8bf105d4c4d58e83ea9f7e165c
font_01_sfnt_off00011413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11413 11044 bytes
SHA-256: 33aecb10c52bb7e953d8cb07a492ce5e58cba5d80abf7ec896ac9ffc79667e44

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