Malicious PDF — malware analysis report

Static analysis result for SHA-256 71cb09347be8910c…

MALICIOUS

PDF

88.3 KB Created: 2021-04-29 14:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c4ad761f8c3e669d45547d295304d9f SHA-1: dff430319182a86e7006d783bac007e4c049663d SHA-256: 71cb09347be8910c6a2711ec7126567cea5d4b57503a8fda72feeee8774ebede
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. Heuristics indicate it is a phishing attempt, and ClamAV detection confirms it is malicious. The ML classifier also flagged it with high confidence. The embedded URL likely leads to a phishing page designed to trick users into revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=graphic+designer+jobs+salary+in+gulf
    • https://static.s123-cdn-static.com/uploads/4369909/normal_5fcf7283a2c30.pdf
    • https://static.s123-cdn-static.com/uploads/4405185/normal_5fcff394943ed.pdf
    • https://cdn-cms.f-static.net/uploads/4408599/normal_605eff433cd85.pdf
    • http://sis-paypal.com/bixetakufovipoduvaghpzp.pdf
    • https://cdn-cms.f-static.net/uploads/4481820/normal_60479bfc5a9a1.pdf
    • https://wapapoda.weebly.com/uploads/1/3/4/5/134581042/fufigejimuzevawu.pdf
    • http://shopwithsale.website/mezupigarabikg2nzs.pdf
    • http://kzrovk.xyz/hp_elitedesk_800_g1_usdtodlk7.pdf
    • https://nevedaroxizewav.weebly.com/uploads/1/3/4/5/134592578/vemipipufibenul.pdf
    • https://cdn-cms.f-static.net/uploads/4406208/normal_600f17817b92d.pdf
    • https://cdn-cms.f-static.net/uploads/4491169/normal_6043dcc140b9b.pdf
    • https://cdn-cms.f-static.net/uploads/4375708/normal_602e36625d88e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/373c408c-b982-42e4-b17d-e30f73d33cd6/definicion_de_artes_plasticas_y_ejemplos.pdf
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_4111d0b6bafc449997a8926f7dc54a63.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a5be6adf-e9e7-417d-9212-e80749bba7e1/10_challenging_interview_questions.pdf
    • https://uploads.strikinglycdn.com/files/cda2b282-5ed6-4285-a967-9f3023c0d7b3/what_is_rii_keyboard.pdf
    • https://93bb5028-8b17-4c47-8ab9-f46a024b0e86.filesusr.com/ugd/041612_16f48f58389c45458e0f2284bf5d410a.pdf?index=true
    • https://ec75ba9f-29a7-4b73-bb51-4c951d20089f.filesusr.com/ugd/17cde0_f388819598e64c89a64b27797f77a185.pdf?index=true
    • 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_off00011c64.bin
597ae6fd91cac859c82f6a9bfcc637f53d11dae0168b8c575315e50bd3640175
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C64 5764 bytes
font_01_sfnt_off00013004.bin
3276b4aea1020f5626c61be30257ee92216ec778745fa544e1e4de2cd6ded7d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x13004 10636 bytes