Malicious PDF — malware analysis report

Static analysis result for SHA-256 df1fb241dbfb1fd9…

MALICIOUS

PDF

83.3 KB Created: 2021-03-20 01:44:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e02f02fd88118bccc4a85e5363e42a8 SHA-1: aa8cb99e7afde8c256b2236f5d6ede7fc024f5f0 SHA-256: df1fb241dbfb1fd9632e7247f6191e64f56987500585fb359e559076cac93dc9
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. It contains a large number of external links, including one pointing to maypoin.ru, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to facilitate access to external resources, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://maypoin.ru/strik?utm_term=what+is+ethics+in+sport+management+degree
    • https://cdn-cms.f-static.net/uploads/4384483/normal_604b95a2b95dc.pdf
    • https://domisupufiz.weebly.com/uploads/1/3/5/3/135316273/df413e2.pdf
    • https://static.s123-cdn-static.com/uploads/4460055/normal_5fe07db589c4e.pdf
    • https://cdn-cms.f-static.net/uploads/4494166/normal_601d0a83d2fa1.pdf
    • https://cdn.sqhk.co/tavaxikanabu/jdxghii/takeout_takeout_restaurants_near_me_open_now.pdf
    • https://zavisedifigi.weebly.com/uploads/1/3/4/3/134316550/zovuverowodum.pdf
    • https://cdn-cms.f-static.net/uploads/4368477/normal_603d1e4c8c76a.pdf
    • http://medicinfo.online/juzubewulabuweril7wyuu.pdf
    • https://kowelisabames.weebly.com/uploads/1/3/1/8/131857626/1564024.pdf
    • http://hookup153.online/9195966794123z5i.pdf
    • http://rcasino.info/87689013913xlaoz.pdf
    • https://wejerimaz.weebly.com/uploads/1/3/4/6/134648800/vodomagowu.pdf
    • https://cdn.sqhk.co/niririga/jgdLhje/baremiwonawebadifebibaxe.pdf
    • https://cdn.sqhk.co/fodexuxefeba/lPieifP/primitive_skateboarding_clothing.pdf
    • https://cdn.sqhk.co/defisepeniba/eichhoY/jokopovofut.pdf
    • https://biziremidawa.weebly.com/uploads/1/3/5/3/135397591/fapilisevusonumejit.pdf
    • https://cdn.sqhk.co/xedasuzefer/zSzpgg3/cartoon_knife_sound_effects.pdf
    • http://copyright-rules-help.com/bikagasufeworitizau1z4v.pdf
    • https://cdn.sqhk.co/bidogefapo/9CjciaH/keresirejorukobudip.pdf
    • https://cdn.sqhk.co/rufebumu/fjiiiuE/list_of_nintendo_switch_video_games_2020.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_9d69f6e150474177b4b9f513e857bc8f.pdf?index=true
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_3436c25e3bd84670ab9dbcf70cad0ea7.pdf?index=true
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_2471b30748a848889150d873ed185344.pdf?index=true
    • https://b56e00ce-d729-42e9-814b-b9a4b194f5ba.filesusr.com/ugd/f6f93f_d4265583a914479280d62dc5249da737.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9c1.bin
cb52dcc6ce12dd73bf2595242f622749e2cb79e7ba98c2f09376b2731114de3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C1 5256 bytes
font_01_sfnt_off00010b6a.bin
0c8ea3f2fc0cf7452687c98c9f49887f4bd94a9b8f0c38dcb4e72a83c9636b9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6A 11188 bytes
font_02_sfnt_off0001319a.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1319A 4324 bytes

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