Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cbac833ca85c68a…

MALICIOUS

PDF

77.6 KB Created: 2021-05-02 22:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1f96d0b081fe8a78f41489b192d4433 SHA-1: 2efa3ec3f5b4b30745b5728fb115127396608832 SHA-256: 2cbac833ca85c68a618d6ed99dab514cb2558af3e9720b56a723f9b8c952bbbc
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to 'botokaw.ru', likely intended to redirect the user to a malicious site or download a secondary payload. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/strik?utm_term=earth%2527s+seasons+worksheet+middle+school
    • https://cdn.sqhk.co/ruwiketi/cvIjdjd/63445231865.pdf
    • https://cdn-cms.f-static.net/uploads/4403951/normal_603a446045b7b.pdf
    • https://static.s123-cdn-static.com/uploads/4471711/normal_5fde6c1abf1ea.pdf
    • https://cdn.sqhk.co/bagekaketox/ihgib7o/appradio_unchained_rootless_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4445106/normal_602474421cccd.pdf
    • https://cdn.sqhk.co/jisepozidis/ghjacyo/hollywood_escape_room_level_68.pdf
    • https://cdn.sqhk.co/xusovatovu/gspahjz/movistar_venezuela_telefonos_atencion_al_cliente.pdf
    • http://drilltech.info/986181252996sezz.pdf
    • https://cdn.sqhk.co/fegukajebaj/dKjfPi3/perseid_meteor_shower_2020_florida.pdf
    • https://cdn.sqhk.co/zogowefu/gPOqhgT/67266104187.pdf
    • http://uscreditinquiry.info/57704306905pg13s.pdf
    • https://cdn.sqhk.co/woxemumi/hfTatDJ/61970608342.pdf
    • https://cdn.sqhk.co/talurelope/ggcTnhb/wanabuzisigiteponenazem.pdf
    • https://cdn.sqhk.co/wenewojufaj/lihQiav/55336045563.pdf
    • https://cdn.sqhk.co/kosenopelid/jjPgeig/trace_elements_definition_biology.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a47494b0-5a40-4541-9cdd-351b5e94a587/34729846675.pdf
    • http://ruwiluleter.epizy.com/fofefusinudobedovifiw.pdf
    • http://tividisexagit.epizy.com/avengers_endgame_movie_in_tamilrockers._ws.pdf
    • https://uploads.strikinglycdn.com/files/d16747a7-b181-476b-bb1c-fd6ac2d1ddfa/ravpower_filehub_plus_manual.pdf
    • https://uploads.strikinglycdn.com/files/8b716c21-a7ef-4764-b7cd-2aaa1a8feef2/cita_los_pasos_del_proceso_de_la_investigacin_social.pdf
    • https://uploads.strikinglycdn.com/files/61f975d4-e1f3-447c-ad47-ce0518263506/delta_table_saw_motor_problems_2020.pdf
    • http://creativecommons.org/licenses/by-sa/3.0
    • 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_off0000f172.bin
93a2acabd70579060331144b7344c30e22a463a2fe8cd6afcb01080f86ae55c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF172 5324 bytes
font_01_sfnt_off0001037d.bin
f9681e345147ca53828a7db09f34b003447229a896d80f0f9bfc8c23fc24837a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1037D 10872 bytes

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