Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8061fa1b9d161a1…

MALICIOUS

PDF

85.8 KB Created: 2021-03-10 20:39:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 74c8e32e46b1958de3cae7f0926933bd SHA-1: c64355e88ec5865c89b43ca78d7c2f9d3294e493 SHA-256: f8061fa1b9d161a1a53dcf0e391fb28dbe153e29fce18a6aaed8a18082ee8ca4
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 numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or redirection mechanism to malicious sites. The document body, though heavily obfuscated, contains references to 'ludi maze pq guide' and 'wkhtmltopdf', indicating a potential lure or exploit context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://leonvi.ru/wix?keyword=ludi+maze+pq+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426966/normal_60390372230df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444864/normal_6018b38e8d1c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477651/normal_60331fcc128a7.pdfIn PDF document text
    • http://websporizle4.com/what_is_psychology_4th_editioncji3j.pdfIn PDF document text
    • http://kemobot.22web.org/zarexesotixilava.pdfIn PDF document text
    • http://storezone.info/femubigutsqsv.pdfIn PDF document text
    • http://votadunepit.22web.org/howard_leight_impact_sport_review.pdfIn PDF document text
    • http://xepuxupipe.mywebcommunity.org/nintex_workflow_sharepoint_online_examples.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/53898172451.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388160/normal_5fcceb7876a0a.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/can_i_make_my_own_sparkling_water7yq23.pdfIn PDF document text
    • http://navevukosuso.mypressonline.com/which_label_printer_is_the_best.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447669/normal_5ff87200e9a9b.pdfIn PDF document text
    • http://lisolu.org/who_started_the_american_navyfqi3p.pdfIn PDF document text
    • http://dsv-trening.ru/mewanemevolevisuo7fw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pekafujojef.onlinewebshop.net/78367975201.pdfIn PDF document text
    • http://nibizuladode.onlinewebshop.net/wumuderarikibivifuzubox.pdfIn PDF document text
    • http://xegefonupekowa.epizy.com/sharepoint_online_office_365_tutorial.pdfIn PDF document text
    • http://kujavuven.epizy.com/28203868770.pdfIn PDF document text
    • http://kimawawasero.onlinewebshop.net/introduction_to_economic_zoology.pdfIn PDF document text
    • http://furunes.onlinewebshop.net/word_families_list_1st_grade.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA5 3132 bytes
SHA-256: 9e021801ff8b1d0063c40c3eaa6952c546f384919900cab8c641f9eb5bafb51f
font_01_sfnt_off000106dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DD 4676 bytes
SHA-256: 5a7aa317eaea8a5b75e2c2b29cc5fc12be15e9868c5602617e224c9fc0d9bcab
font_02_sfnt_off000116bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BB 10896 bytes
SHA-256: c00be50bfb6c8929ef0e51310f044b84f8191a2748be55d8bc10701599dfb4e0
font_03_sfnt_off00013bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BCA 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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