Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf37f2502871efe…

MALICIOUS

PDF

84.3 KB Created: 2021-04-05 04:25:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 194fe102e98684ded5be44b9abb26bd3 SHA-1: dd7b343154a31f30275df42008c9fd7d3fab2b91 SHA-256: 8cf37f2502871efe3e836c3d443d2fe7ac1ba1e31e0150cb6c15807e11ecc5c6
96 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically flagged as malicious and associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs suggests the document is designed to redirect the user to a potentially harmful site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://ponafet.ru/strik?utm_term=coleman+powermate+pulse+1850+oil+capacity
    • http://natur-bio.space/joxesaw87z0v.pdf
    • https://cdn.sqhk.co/tikugubobo/Wfljjjc/let_s_draw_together.pdf
    • http://nepifumawal.22web.org/42485795483.pdf
    • http://zudetubakameg.iblogger.org/how_many_members_should_an_audit_committee_have.pdf
    • http://chambre.xyz/pilomopowexapojakbybhy.pdf
    • https://cdn.sqhk.co/woxutonezem/HGhhZdd/craftmade_ceiling_fan_installation_manual.pdf
    • https://cdn.sqhk.co/waganozusi/fsHFgeR/inshore_fishing_guides_tampa_bay.pdf
    • http://community-day.ru/53650722416yf5e0.pdf
    • https://cdn.sqhk.co/bokapapukopa/Vgfjiib/46748143990.pdf
    • http://dotenuvofatawe.iblogger.org/kitab_maulid_burdah.pdf
    • http://meinekarten.best/the_husbands_secret_author2pwfz.pdf
    • https://cdn.sqhk.co/zurefaxenov/p5igjhc/nimowavubaneg.pdf
    • http://ecosbor.net/jujowimetuwifureketadurajpou2w.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/caade96f-0d99-4f7c-a907-421652b2fddd/epson_surecolor_sc-v7000.pdf
    • https://s3.amazonaws.com/betefowubevat/rowdy_baby_video_masstamilan.pdf
    • http://tuvinasonim.epizy.com/athlean_x_program_free.pdf
    • https://s3.amazonaws.com/poresi/the_role_of_internal_auditing_on_management_control_success.pdf
    • http://megisaduvivegi.epizy.com/go_math_grade_5_answers_volume_2.pdf
    • http://zepibugab.rf.gd/17281866428.pdf
    • https://s3.amazonaws.com/faduxodiwo/pdf_markup_app_ipad.pdf
    • https://uploads.strikinglycdn.com/files/fe930559-2d5b-4382-b5c6-1c5ff495dfd7/14489259780.pdf
    • https://uploads.strikinglycdn.com/files/d49d7f4f-3770-430c-a6aa-d419685b2a2c/81222238088.pdf
    • https://uploads.strikinglycdn.com/files/38d7e98a-eeee-43f4-a470-c5d2bc3ea740/navy_eval_writing_instruction.pdf
    • https://uploads.strikinglycdn.com/files/5445c909-45e0-4f60-91af-73493dfe6707/54430118006.pdf
    • https://s3.amazonaws.com/gotenukevepunin/mass_gaining_workout_program_bodybuilding.pdf
    • http://lujarozukivexoz.epizy.com/74271966070.pdf
    • http://nuvezutonotogev.epizy.com/is_sony_xplod_subs_good.pdf
    • http://zazufazujinuzo.rf.gd/saledukupukegam.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_off00010841.bin
f2af59ea8b36310d6c30c9f67ef8c4e91d0d85c8446608ca4f1b8a7f9ca8d9e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10841 5692 bytes
font_01_sfnt_off00011ba4.bin
6d8d11f4d1f2f84026c2a98f454ddf02507d0c18a5305ac59e51f18ca3e94d3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA4 11620 bytes

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