Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c38a2ca1fd49b11…

MALICIOUS

PDF

78.1 KB Created: 2021-05-01 20:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08daa6944286251bca595a8b212b81e5 SHA-1: b1f32c20eea15ac1e05e2480897f017e629ec70a SHA-256: 2c38a2ca1fd49b11cefbbb555fa6e5d55b60557ff3c18a6ceccfcc1b8cb10a43
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, suggesting it functions as a link farm or a distribution point for malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs point to suspicious domains, and the document's metadata indicates it was generated by wkhtmltopdf, a tool often used to create fake documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/strik?utm_term=contax+t2+camera+manual
    • https://cdn.sqhk.co/xubupigegi/hfmw6gi/steampunk_defense_tower_defense.pdf
    • https://riginujer.weebly.com/uploads/1/3/2/6/132695799/d5e011a3096ec9.pdf
    • https://static.s123-cdn-static.com/uploads/4408706/normal_600154e52e3a2.pdf
    • https://cdn-cms.f-static.net/uploads/4458838/normal_603a984f692ab.pdf
    • https://cdn-cms.f-static.net/uploads/4420449/normal_601558c02d69f.pdf
    • https://kilizilefepik.weebly.com/uploads/1/3/0/7/130775254/sowopebafebaxadajavo.pdf
    • https://static.s123-cdn-static.com/uploads/4421218/normal_5fff773b3daff.pdf
    • https://cdn-cms.f-static.net/uploads/4394068/normal_60383f86da6cf.pdf
    • https://jenitexul.weebly.com/uploads/1/3/4/8/134859983/dfd353648c4.pdf
    • https://cdn-cms.f-static.net/uploads/4450160/normal_603c2690aa4c6.pdf
    • https://gakififevorejep.weebly.com/uploads/1/3/1/8/131872199/fipijisipojiwi.pdf
    • https://nugilura.weebly.com/uploads/1/3/5/3/135317706/6690037.pdf
    • https://static.s123-cdn-static.com/uploads/4458838/normal_5fe5585f0598f.pdf
    • https://cdn.sqhk.co/dewufidabo/elu9lNS/gukuluxigiviwujot.pdf
    • https://timakopazasiri.weebly.com/uploads/1/3/4/4/134445807/lunota_muxone_komufine.pdf
    • https://xarojitoma.weebly.com/uploads/1/3/5/3/135305856/9384668.pdf
    • https://static.s123-cdn-static.com/uploads/4479675/normal_6009309334aa5.pdf
    • https://cdn.sqhk.co/wesuwajil/1iahbj1/14113314930.pdf
    • https://duzuvopewawufos.weebly.com/uploads/1/3/4/4/134491429/retaku-rilunetiki-werevitalose-pitudekimepob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/282d8acf-daf1-4f7c-8323-c6a9caa9bbbf/the_hunger_games_2013_full_movie_download_in_hindi_filmyzilla.pdf
    • https://uploads.strikinglycdn.com/files/6dd04726-91a1-458b-a8bc-e3ee932a9b51/femekiwirowafusitijivebum.pdf
    • https://uploads.strikinglycdn.com/files/ac752471-9caf-4240-b2d0-98d5b5d94408/mechanics_of_materials_chapter_3_solution_manual.pdf
    • https://uploads.strikinglycdn.com/files/7d84c60b-1b39-4691-813c-a4b348257b9c/a_christmas_carol_cast_2019_old_vic.pdf
    • https://uploads.strikinglycdn.com/files/879706f3-09cf-4334-9e48-3344ed4ace60/wadatemuwokak.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_off0000f4a9.bin
8af7df6ad2c217846a0eea71d17e0aacc58bf05d674e6475a2c434f1c5e36469		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A9 4872 bytes
font_01_sfnt_off00010529.bin
a39e24b5c4323d9cd2e44262df3ad735b2aa152ad21aab7c5018466b5ca3cc95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10529 11112 bytes

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