Malicious PDF — malware analysis report

Static analysis result for SHA-256 4886632ecc7e3c5b…

MALICIOUS

PDF

78.7 KB Created: 2021-04-06 13:20:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce27195187068310c022abff071aaedf SHA-1: 75d5d12a39044ccc08a388c355c60bd59358d830 SHA-256: 4886632ecc7e3c5b24ccceba3750d871c81f498b56d60597e467b3615a3fb322
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating an external URI and embedded URLs, with a high ML classifier score and ClamAV detection confirming maliciousness. The primary malicious URL, 'https://dafemum.ru/strik?utm_term=how+to+learn+final+cut+pro', is presented as a lure related to learning Final Cut Pro. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall detection suggest the document is designed to redirect users to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://dafemum.ru/strik?utm_term=how+to+learn+final+cut+pro
    • https://cdn-cms.f-static.net/uploads/4497110/normal_603dc974ac80a.pdf
    • http://xopaberowiwin.getenjoyment.net/zonelotajitezipixetedefej.pdf
    • https://cdn-cms.f-static.net/uploads/4419430/normal_6056a3ca0ebf3.pdf
    • https://cdn-cms.f-static.net/uploads/4403683/normal_603b8a978b518.pdf
    • https://cdn-cms.f-static.net/uploads/4448547/normal_5fd6781f1a8a5.pdf
    • https://cdn-cms.f-static.net/uploads/4463275/normal_5fda902b5657c.pdf
    • https://cdn.sqhk.co/kagalitisup/cjjgijg/nuxode.pdf
    • https://cdn.sqhk.co/vatomepipiw/dggRhdt/ahl_teams_owned_by_nhl_teams.pdf
    • http://wizatone.iblogger.org/que_significa_no_robaras_en_la_biblia.pdf
    • http://xamoxipuwizutux.scienceontheweb.net/the_things_they_carried_sparknotes_quiz.pdf
    • https://cdn.sqhk.co/wuxidubez/igdjfja/nixepo.pdf
    • https://cdn.sqhk.co/zasemewiti/ibcgdqy/roomster_roommates_roommate_roommate_finder_texas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a004ee08-fe41-493e-9e3a-ac207e74738f/dark_souls_remastered_wiki_espaol.pdf
    • https://s3.amazonaws.com/jolituzoji/vowidoluwesuvugalupadole.pdf
    • http://wivufaw.epizy.com/dell_latitude_e6430_i5-3340m_specs.pdf
    • http://vofogidazok.epizy.com/dupewawojefexi.pdf
    • https://s3.amazonaws.com/zozofufulolig/78686671741.pdf
    • https://uploads.strikinglycdn.com/files/aa9e4b09-ac8e-431e-a5ef-fcfba6d84010/community_health_centers_of_pinellas_clearwater_florida.pdf
    • https://s3.amazonaws.com/sumesawoxajew/sizuxam.pdf
    • https://uploads.strikinglycdn.com/files/68c93afc-68d1-4e5e-a330-6e3562eac03b/kavizagevo.pdf
    • http://guxejusoselota.myartsonline.com/17334274557.pdf
    • http://pezamax.myartsonline.com/zetipagan.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_off0000f77e.bin
a033366874252eafb58c781d3082ddc9f7c0e90e0f97b0a37dad70048d7079e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF77E 4884 bytes
font_01_sfnt_off0001083a.bin
33a1e3cd24c38df78ba298c4be2b2a001c3bcb5ef215d3926db1ff4d869f29fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1083A 10908 bytes

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