Malicious PDF — malware analysis report

Static analysis result for SHA-256 de1ad9f4c7d29b21…

MALICIOUS

PDF

81.5 KB Created: 2021-04-16 07:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 306509ae18746a01d8de14d4f0e43f6a SHA-1: b5cb88a0c876b4c4c64298cfc42af632f52d2d76 SHA-256: de1ad9f4c7d29b2142e1d0f79fc05589e0015350c783049b889bafa1aeac6064
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a domain associated with malicious activity, and ClamAV detection confirms its malicious nature. The ML classifier also flagged it with high confidence. The document body, though heavily obfuscated, appears to contain metadata related to 'wkhtmltopdf' and product information, suggesting a lure to disguise the malicious link. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=craftsman+29937+4-cycle+mini+tiller+parts
    • https://cdn.sqhk.co/lexewagoz/oxjf84C/lajorukekutuzinadebaki.pdf
    • https://cdn.sqhk.co/bepeguvovori/gjngjjb/lodetolopexafagus.pdf
    • http://delayikapy.xyz/applying_economics_worksheet_factors_of_production_answers20ek1.pdf
    • https://cdn.sqhk.co/kerodamajop/wfprihq/steel_and_flesh.pdf
    • https://cdn.sqhk.co/biluvetizom/jGifge3/27434910557.pdf
    • http://chtotakoeverti.biz/que_es_una_composicin_en_artes_visualestiq44.pdf
    • https://static.s123-cdn-static.com/uploads/4449406/normal_5ffcf41d684f7.pdf
    • http://zesamoa.online/which_is_the_most_coldest_city_in_canadafpsoz.pdf
    • https://cdn.sqhk.co/migiwepi/LdkQge4/balanced_literacy_weekly_lesson_plan_template.pdf
    • https://cdn.sqhk.co/baxemazisod/jf2bBhg/kohler_toilet_runs_randomly.pdf
    • http://chategratis.online/rebelion_en_la_granja_pelicula_completa_en_espaol_latino_descargar6ugce.pdf
    • http://activa-fb.com/soviet_union_constitutionmah4d.pdf
    • https://cdn-cms.f-static.net/uploads/4458122/normal_604370e22ec9b.pdf
    • http://tuleruwigex.iblogger.org/19085969140.pdf
    • https://cdn.sqhk.co/galuladoxaka/sqKjeie/fuduvujewoposopevaneruto.pdf
    • http://lapuxuzogu.22web.org/movie_air_force_one.pdf
    • https://cdn.sqhk.co/lazodadevab/YAU5ifT/ewp_2014_electrical_wiring_problem.pdf
    • http://tolofat.22web.org/rafaxigijapajidenoluzoxik.pdf
    • http://tudewulowas.iblogger.org/bitozikawemo.pdf
    • https://static.s123-cdn-static.com/uploads/4381748/normal_5fcfe9c86b42e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vogokobujapipam.epizy.com/buffer_solution_download.pdf
    • http://valopuloti.rf.gd/73559590118.pdf
    • http://saxowuwu.rf.gd/73874042944.pdf
    • http://velevemi.epizy.com/32579821147.pdf
    • http://vaxinot.epizy.com/paxiwelijuzetepixolotu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd25.bin
97a49d10f4404e42164ceca1efe1301e93e22377dca2872b04d8f433cf2f12d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD25 5820 bytes
font_01_sfnt_off000110fa.bin
a7d673e996b722701800d842ffe44e026123cce5af01f2d17c7c1b0b11cb6608		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110FA 11576 bytes

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