Malicious PDF — malware analysis report

Static analysis result for SHA-256 892a03b52fe6e933…

MALICIOUS

PDF

76.7 KB Created: 2021-03-07 01:47:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe1e5cb61c65cef52f9fdb9e019c0ce5 SHA-1: 7928fe04615918e678023987538c7f8492f64be8 SHA-256: 892a03b52fe6e933808f52ba39e5a55d1f3bda5ae38d0559ae910e8a76b8e2f2
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. The document contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of these numerous links strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/wix?keyword=living+environment+regents+august+17+2017+answers
    • https://static.s123-cdn-static.com/uploads/4374686/normal_5ff40154e8815.pdf
    • https://cdn.sqhk.co/novozefox/jcSDAhi/meme_stickers_for_messenger.pdf
    • http://wamuwosola.mygamesonline.org/the_bronze_horseman_movie_watch_online.pdf
    • http://hookup153.space/bewubezoximetto8r.pdf
    • https://cdn.sqhk.co/mumaxifup/djVSvh5/mobily_fiber_apply.pdf
    • https://static.s123-cdn-static.com/uploads/4408475/normal_5fe2d9139cc7a.pdf
    • https://static.s123-cdn-static.com/uploads/4494149/normal_5ff7129ccc959.pdf
    • http://geosen.net/53871988158btj3a.pdf
    • http://sakulog.sportsontheweb.net/get_tough_approach_to_crime_definition.pdf
    • https://cdn.sqhk.co/kekagate/xieRhgU/best_wallpapers_for_samsung_s10e.pdf
    • http://muzomabavima.medianewsonline.com/sole_e35_installation_manual.pdf
    • https://cdn.sqhk.co/porosobof/gdgjy1h/cx500_cafe_racer_seat_cowl.pdf
    • http://optalpha.com/game_blocky_highway_mod_apk49nlk.pdf
    • https://cdn.sqhk.co/bavimimo/8idegh2/27957837266.pdf
    • https://static.s123-cdn-static.com/uploads/4366633/normal_5fcf4886dd446.pdf
    • http://gosugas.getenjoyment.net/grade_5_math_workbook_free.pdf
    • http://1xbet-registr.site/genalobipikivagasozipobvxkf6.pdf
    • http://kernig.online/nufevuranubexanusadusoftq6.pdf
    • http://copriyghtconfirmed.com/what_is_fit_for_life_diet_plan88jal.pdf
    • http://reduslimitaly-official.website/acrow_prop_size_guidejicdq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tipokeviti.atwebpages.com/how_to_enable_wifi_direct_on_hp_printer.pdf
    • http://bototiluwoge.atwebpages.com/best_american_cookery_books.pdf
    • http://vekemelegewimo.atwebpages.com/web_services_testing_with_soapui_free_download.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_off0000e47a.bin
efe3175802fa5149b12cc6ccfc4f546f83a7f623080b1c4b5641193013651f13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE47A 5472 bytes
font_01_sfnt_off0000f723.bin
32c59399d93caa1e9d1f185690d3f5f425271a92a578d07fd6f324fc03ea1c00		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF723 14948 bytes

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