Malicious PDF — malware analysis report

Static analysis result for SHA-256 65aa7f793910b739…

MALICIOUS

PDF

93.3 KB Created: 2021-03-18 10:25:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 862730f95aaa67084d4249597e53a8c1 SHA-1: 1f653664c57a6ed59be9b545c513a0ac0de0fa54 SHA-256: 65aa7f793910b739056c2dc592e66476cf0588701170177eb7af6bd834b0b0a7
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, a common tactic for SEO link farms and phishing. The document body, though partially corrupted, suggests a lure related to the "Kamyab jawan program". The primary malicious URL identified, https://dafemum.ru/award, is likely used to redirect users to a phishing or malware hosting site. The presence of PDF-specific heuristics and the ML classifier output strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/award?keyword=kamyab+jawan+program+details+in+urdu+pdf
    • https://palotuzumi.weebly.com/uploads/1/3/5/9/135991270/wujukerebis_rolox_jezezixedep_bimerusewiwezo.pdf
    • https://wipugetawunuw.weebly.com/uploads/1/3/5/3/135302850/978626.pdf
    • http://all-gopro.com/euro_truck_simulator_2_tr_yamalar_modifiyeli_indir8mcf4.pdf
    • http://kernig.pro/bidowelirememng7ln.pdf
    • http://sujabupinoda.scienceontheweb.net/para_que_sirve_el_te_de_manzanilla_con_hojas_de_limon.pdf
    • https://rodironamo.weebly.com/uploads/1/3/5/3/135347674/zexozijivope.pdf
    • http://itprod.space/vibemoruzurudc596p.pdf
    • https://ketafimevudo.weebly.com/uploads/1/3/1/6/131637081/b4a7a20.pdf
    • http://jorowijedo.mywebcommunity.org/87027711585.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/topipovikapari/senebinatalinu.pdf
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_2bc7ddc2b0c8410fa62606d02e10b5eb.pdf?index=true
    • http://rususekobijo.myartsonline.com/msrm_us302_wifi_range_extender_reset.pdf
    • http://pedirite.onlinewebshop.net/kurapadabaz.pdf
    • https://s3.amazonaws.com/pazatuv/agree_tool.pdf
    • https://s3.amazonaws.com/wajibile/dishonored_inform_callista.pdf
    • https://s3.amazonaws.com/loxopudizus/lirozedan.pdf
    • https://580b68e3-2104-4118-ae5b-4f285de1c062.filesusr.com/ugd/dad7b5_383f1edc31d84b3786afef653479e24d.pdf?index=true
    • https://s3.amazonaws.com/padosumifubobo/povapixovikanabuwo.pdf
    • https://s3.amazonaws.com/jukoxisojow/swarm_intelligence_principles_advances_and_applications.pdf
    • https://s3.amazonaws.com/palikuvexake/dijarolofabugimoriminada.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000138d3.bin
e18e142b7c3bf33c395b99e8b641a5d9db3510ee9f0e153a70a3c86381debc9f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x138D3 26492 bytes
font_00_sfnt_off0000fe2b.bin
ee02d502d4b91a087cc5159f95833e192185e3d5c16c06339e68ef579af59061		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2B 5740 bytes
font_01_sfnt_off000111c2.bin
88eee1949def4cb80724b7ddd98a9035b80185c25d85b45113fe5280857fe27c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111C2 11432 bytes

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