Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d611678c8510977…

MALICIOUS

PDF

76.1 KB Created: 2021-03-15 15:55:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4c2caa6cec9f7e7b97dc90773320b1e SHA-1: d7b346aa525690038ad25022a55d07f3fdda80b0 SHA-256: 0d611678c851097765eb3a07f94732f735b58858e9115e6fae0ae9424efe4606
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms and phishing sites, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/wix?keyword=federalism+worksheet+middle+school
    • https://ranalugepileli.weebly.com/uploads/1/3/4/7/134735155/328104df81b4c.pdf
    • http://dukawipo.22web.org/cashew_nut_processing_business_plan.pdf
    • https://cdn.sqhk.co/lilaxikixo/jitQIii/waxikawifumuvijod.pdf
    • https://cdn.sqhk.co/zutujodara/ig04tCJ/fafupexexole.pdf
    • https://cdn.sqhk.co/robimovule/jdhghew/fall_cake_decorating.pdf
    • https://cdn.sqhk.co/dajebala/LHjbTlF/lagu_bossanova_jawa_full_album.pdf
    • https://cdn.sqhk.co/tobepeliv/cDidkEK/36089717711.pdf
    • http://dogisutuzise.22web.org/good_and_cheap_cookbook.pdf
    • https://cdn.sqhk.co/zimidenex/ijbiahf/79877198904.pdf
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/29f42c0e.pdf
    • https://cdn.sqhk.co/rarukaboz/cQ9VGjv/contacts_cheaper_than_glasses.pdf
    • https://viwosexoteb.weebly.com/uploads/1/3/4/6/134631328/bc1a487f69.pdf
    • http://sekodosara.22web.org/lugugumak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/guvovigo/70113363345.pdf
    • https://s3.amazonaws.com/mevuzokekenojab/watch_romeo_and_juliet_1996_online_free_hd.pdf
    • https://s3.amazonaws.com/rilexazejuzovep/pengertian_bronkopneumonia.pdf
    • http://losaxoxajav.epizy.com/movoxaxokinisu.pdf
    • https://s3.amazonaws.com/wutisigila/what_is_the_basics_of_quantum_physics.pdf
    • https://s3.amazonaws.com/falevi/themes_in_romeo_and_juliet_act_1_scene_2.pdf
    • https://s3.amazonaws.com/baxunaf/battleship_board_game.pdf
    • http://wufajin.rf.gd/tawagarefe.pdf
    • https://s3.amazonaws.com/gurowozenupifi/71620444900.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_off0000edd2.bin
e8141c4ef51a6351f6f42a904af38705230126519d94ffff2c10cdcf8db382a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD2 5292 bytes
font_01_sfnt_off0000ffb6.bin
8f136273ff002249af56a91be6261eb3350d664e7466477557c25f1807df8bef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB6 10420 bytes

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