Malicious PDF — malware analysis report

Static analysis result for SHA-256 03164a59ae52c6e0…

MALICIOUS

PDF

78.3 KB Created: 2021-06-02 21:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fa2a597b936d5573645e5c5e7746b025 SHA-1: 91ec45c5ba3db8b53c9aa9e7c375bf727485d64b SHA-256: 03164a59ae52c6e0e027a989221b7056beb1181c434f3343973353279b067df0
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, which is characteristic of link farms used for phishing or malware distribution. The document body, though heavily obfuscated, contains references to a video game, likely a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://oniceh.ru/pbw?utm_term=guia+super+mario+bros+2+nintendo+3ds PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452608/normal_606e78382f0af.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4390329/normal_60b1f6bc37b76.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485927/normal_5fc9860d401a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381102/normal_6026784dcf4ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379718/normal_6004cf5b01ff7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464055/normal_602aacd14943f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379477/normal_600612822b5d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423780/normal_5fef0c31ac259.pdfIn PDF document text
    • https://danulezide.weebly.com/uploads/1/3/4/6/134601395/6464969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407813/normal_60130e4b710bd.pdfIn PDF document text
    • https://kotidureguk.weebly.com/uploads/1/3/0/7/130776457/gofob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sozakuvepar.pbworks.com/w/file/fetch/144488910/bedava_trke_dublaj_kovboy_filmi_izle.pdfIn PDF document text
    • http://runaliguredu.pbworks.com/f/17893354160.pdfIn PDF document text
    • http://genarozep.pbworks.com/f/anjaan_special_crimes_unit_episode_47.pdfIn PDF document text
    • http://padimagofo.pbworks.com/w/file/fetch/144454059/gawogufafemot.pdfIn PDF document text
    • http://jitilabajeko.pbworks.com/w/file/fetch/144505566/how_to_get_infinite_gems_in_dragon_city_2020.pdfIn PDF document text
    • http://gemometis.pbworks.com/w/file/fetch/144513468/icloud_unlock_software_free_download_for_pc_2018.pdfIn PDF document text
    • http://fatakalewene.pbworks.com/f/tajuzedolubikon.pdfIn PDF document text
    • http://vifogajo.pbworks.com/w/file/fetch/144510069/29686559962.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/f/rajifanovexanisemafezeku.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03A 4792 bytes
SHA-256: 1dec727fe34cf294bdef1588a48d80910f6a5f1dfa76271a57d771522f7ad6f4
font_01_sfnt_off0000f0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A5 5540 bytes
SHA-256: 7cb9e957c2113848190acaf663df1ce97ed6ef5ba758fb32c2026fd04bc5b136
font_02_sfnt_off00010364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10364 11912 bytes
SHA-256: 9e3ba3c7830b2281aab64579fb4bfddf1efc59cdc4e73e837851a06c0ea6d001

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