Malicious PDF — malware analysis report

Static analysis result for SHA-256 382c85286fdb5e9c…

MALICIOUS

PDF

75.2 KB Created: 2021-03-20 09:50:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 10b965da9a614610b69b5c09bb7b5b7e SHA-1: 458b132017d01a5d6f91cd3c3be651d7f0efec44 SHA-256: 382c85286fdb5e9cbfddf36f12414fa2cd2c73cb9237123cd547d72511af9825
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 phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a date, but no direct instructions or lures. The presence of embedded JavaScript, though not explicitly detailed in the provided evidence, is a common vector for malicious PDFs to execute further actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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/123?utm_term=synonyms+for+useful+information PDF link annotation
    • http://giocodigital.space/63225202090666c5.pdfIn PDF document text
    • https://lekumoga.weebly.com/uploads/1/3/2/6/132683130/lirirudizobojufu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406481/normal_60558ce1dde41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374847/normal_5ff8f29319a9e.pdfIn PDF document text
    • http://c-advance.space/bhula_diya_song_pagalworld._iojfzzj.pdfIn PDF document text
    • http://about-fb-support.com/damulorojudekemofavuxubo3psmo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486061/normal_6045fd2c46ccb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493553/normal_5fc5a2e8bd9ef.pdfIn PDF document text
    • https://pixamowogiru.weebly.com/uploads/1/3/4/5/134590731/0a3bb6f42f866ba.pdfIn PDF document text
    • https://cdn.sqhk.co/rotelizedo/giaR5ib/joe_pesci_okay_okay_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/5BeicNN/fastest_way_to_max_out_shooting_badges_2k20.pdfIn PDF document text
    • https://cdn.sqhk.co/vonirosidejo/giuiecI/20545901921.pdfIn PDF document text
    • http://buloshnaya.site/rca_systemlink_3_universal_remote_rcu_300_codesdkbj3.pdfIn PDF document text
    • http://kerufeki.22web.org/hp_8600_printhead_cleaning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480891/normal_603b933744bdb.pdfIn PDF document text
    • https://tinalolovini.weebly.com/uploads/1/3/4/3/134371967/zefegupum_bevis.pdfIn PDF document text
    • https://cdn.sqhk.co/rigepasemapa/jhicIhi/draw_climber_best_legs.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/gbeBgsX/51052163665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460457/normal_6021cedcd4cd5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://meralilenizo.epizy.com/90178369689.pdfIn PDF document text
    • http://diwuvugu.epizy.com/54010838663.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_off0000ea7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7A 5116 bytes
SHA-256: 5a780929d76b252d85416aadf11400f363d67b55bfbbae8b22af6a1534546ff3
font_01_sfnt_off0000fbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCF 10320 bytes
SHA-256: 8f063061fa20131d6047e17bd171838887d2f6db1ae6c54449e100d880f8b143

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