Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b6147c511c677e0…

MALICIOUS

PDF

81.3 KB Created: 2021-04-26 13:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a87a47f6ae8abc6afff88558c02dcf43 SHA-1: 1202ee5c69042ad87ce8230a3b26fe0e5f01f126 SHA-256: 8b6147c511c677e0ad862d5a028a08aee84f832126c0966a20bc1cf02f573412
134 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. It contains numerous external links, many pointing to disposable domains, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the 'Fake invoice / payment lure' heuristic further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://ponafet.ru/strik?utm_term=what+does+palsy+mean+in+medical+terms
    • https://cdn-cms.f-static.net/uploads/4427538/normal_603901059995e.pdf
    • https://xugimitedekilim.weebly.com/uploads/1/3/1/4/131482884/wufadedojas.pdf
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/5012991.pdf
    • https://cdn.sqhk.co/noperizapewo/2Qnge8g/cppcon_2019_trip_report.pdf
    • https://tuwureliw.weebly.com/uploads/1/3/4/1/134108737/3e8378e2.pdf
    • https://cdn-cms.f-static.net/uploads/4368229/normal_60359d508fe50.pdf
    • https://cdn.sqhk.co/teduwugevoki/ihR7u4B/line_segment_ab_symbol.pdf
    • https://static.s123-cdn-static.com/uploads/4404512/normal_5fcb3c706b9d8.pdf
    • http://vujenixuwo.mypressonline.com/biodata_form_printable.pdf
    • https://jumufewaxijakuk.weebly.com/uploads/1/3/1/3/131380308/rovewedu_dafavonatedowu_pekuwozevu.pdf
    • http://mizejodaf.mywebcommunity.org/3d_reader_android.pdf
    • https://devudupaf.weebly.com/uploads/1/3/4/8/134880603/sewopiban.pdf
    • https://static.s123-cdn-static.com/uploads/4494866/normal_60052082bf000.pdf
    • https://cdn-cms.f-static.net/uploads/4466675/normal_60308474c3001.pdf
    • http://bugosegu.scienceontheweb.net/67315294309.pdf
    • https://cdn.sqhk.co/musezikuzapi/ijN0zQn/bluff_definition_francais.pdf
    • https://cdn.sqhk.co/xogedusov/W34bSOk/27550188275.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0a588758-a12e-4a3d-ac74-b88e09c0f3c7/how_to_solve_half_life_problems_in_pre_calc.pdf
    • http://zaduzos.myartsonline.com/saxuzokibidajon.pdf
    • http://xovefopu.myartsonline.com/13135047881.pdf
    • http://xixivozute.myartsonline.com/segment_addition_postulate_and_midpoint_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/91b52a6f-78a4-40fe-9a82-8e2f63278190/75524024401.pdf
    • http://vepitejususas.atwebpages.com/tejeterovogitefepibag.pdf
    • https://uploads.strikinglycdn.com/files/cdb5983e-e62d-4e52-a1b0-546b31119b67/gegewopikaw.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_off000100f0.bin
22e04558794937a0a5d218905d71b117e3f9b2200e31e051db2af42e2bdd1dae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100F0 5428 bytes
font_01_sfnt_off00011350.bin
2bb3426644d4e36740bd4e1fe741812ec7f275f31a042074714a5ab4865c0310		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11350 10680 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.