Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d262fbedd03bffb…

MALICIOUS

PDF

73.2 KB Created: 2021-04-06 01:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08fc110301a9146621d56a24066a5219 SHA-1: dd725c918890bd22a542fa1842644cbd1b628303 SHA-256: 2d262fbedd03bffbcff53822481a2ee7d50878ee04b85790e69e4e7c71e0337f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. One of these links, 'https://soxebez.ru/wix?keyword=probability+of+continued+employment+voe', is directly embedded in the document. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests an attempt to exploit PDF vulnerabilities or trick users into visiting malicious sites.

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://soxebez.ru/wix?keyword=probability+of+continued+employment+voe
    • http://dumubemajizukov.medianewsonline.com/how_much_does_a_swat_officer_make_in_texas.pdf
    • http://rojibitakuvekuw.scienceontheweb.net/railway_assistant_loco_pilot_syllabus_2020.pdf
    • https://latewumopinigan.weebly.com/uploads/1/3/4/3/134313498/tamuz.pdf
    • http://jumuzonogajal.iblogger.org/carbide_inserts_types.pdf
    • https://sirutobij.weebly.com/uploads/1/3/0/7/130776617/77113.pdf
    • https://pozanabuloga.weebly.com/uploads/1/3/4/3/134366917/dununegif-sopafukom-tenidetob.pdf
    • http://gavediteriremuv.medianewsonline.com/fegupijanatu.pdf
    • https://kinijenu.weebly.com/uploads/1/3/4/6/134641264/vadavafi-tatiguxedipum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://daxevetefixidaj.epizy.com/4509729961.pdf
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_0af20f6882914e9ebe3f20e0d957ade3.pdf?index=true
    • http://gixiluvigatekij.atwebpages.com/2546729515.pdf
    • http://sevejegizala.rf.gd/is_history_of_mathematics_useful.pdf
    • http://muvavobijipege.rf.gd/9982253728.pdf
    • https://39472683-7d43-4bc3-882b-0947a83fd973.filesusr.com/ugd/544c7e_77b3500628a84ace9e070e22120dd97a.pdf?index=true
    • http://nabavewixetutax.epizy.com/rpg_games_android_2019.pdf
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_d92f707a608d4362960eba390486c196.pdf?index=true
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_99fbdcab294c476cb0c2fd8b0494c3e9.pdf?index=true
    • https://s3.amazonaws.com/tobaziw/61001668240.pdf
    • https://s3.amazonaws.com/nuxulikiwab/2017_honda_civic_turbo_maintenance_schedule.pdf
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_c1d21e3cac3f471f9c45d29229d9ce42.pdf?index=true
    • https://s3.amazonaws.com/bofake/jeramopiruforumomolek.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_off0000e002.bin
a4653fed9fae2766bde34b410c34c9c7da456700bee8090e008349ff6e44adbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE002 5424 bytes
font_01_sfnt_off0000f26b.bin
782071fb82e6b55161367c115623910b6479e2367f1da16e7081d4143a1cb13e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF26B 10816 bytes

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