Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3e28f7bc04d7ff…

MALICIOUS

PDF

75.4 KB Created: 2021-03-07 13:12:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 9cd0dd1fea166a526545376eb1fbfa99 SHA-1: 5b69722a1d89290806e3c1d10259c352343129af SHA-256: 2b3e28f7bc04d7ffbc61e6c226b13fd2b476528958df44b035a2803cc379a82c
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 of which point to disposable hosting and are likely used to distribute further malicious content or conduct phishing. The presence of external URIs and link farm characteristics indicates a deliberate attempt to redirect users to potentially harmful sites.

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://nipisod.ru/strik?utm_term=the+making+of+a+poem+a+norton+anthology+of+poetic+forms+ebook PDF link annotation
    • http://mopafebofin.22web.org/target_market_report_example.pdfIn PDF document text
    • http://probmake12.xyz/weight_of_4x8_plywood_sheetscg2fv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389599/normal_5ffccf8b4813c.pdfIn PDF document text
    • http://reactivascotia2020.com/kipagawijiritdtbbo.pdfIn PDF document text
    • http://fasad-dom.site/cyberpunk_2077_is_johnny_silverhand_a_bad_guypxuti.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/dOkjb5G/lepew.pdfIn PDF document text
    • http://nitalesilafatem.22web.org/52444703892.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488556/normal_5fe24947a39fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488582/normal_60205932b8072.pdfIn PDF document text
    • http://kyponnik.online/hernia_inguinal_pediatria_2010www9h.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/kigKDbC/angular_template_driven_forms_validation_example.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427293/normal_600d424a5c341.pdfIn PDF document text
    • http://dithetsen.xyz/are_wii_games_still_being_made4w97f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_79818d870c824ad88a4d03a1011be78a.pdf?index=trueIn PDF document text
    • http://dagajevefud.epizy.com/petajogokexomuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b71961f-1a6b-4705-b111-085ff994503e/don_diablo_dj_mag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ac55eb1-d20e-49c3-9f60-17d45533c187/sewateg.pdfIn PDF document text
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_b67b0d2f1a3541ea801def2124a070fe.pdf?index=trueIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_658dd2b31d9f46eb81d5e15c06acc664.pdf?index=trueIn PDF document text
    • http://kiluwemejibe.rf.gd/coffeescript_performance_vs_javascript.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_off0000e668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE668 5684 bytes
SHA-256: e1360216f10c52f4a7e1c3affdcc8bea9bb25c1f7eb606708f95b777c40435f2
font_01_sfnt_off0000f99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99E 10672 bytes
SHA-256: 7b0e4af383b2d600d1cc147b70568372d00102efebedc6b1794e99294c3ef994

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