Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd85ffacb1c0fb4e…

MALICIOUS

PDF

75.3 KB Created: 2021-04-04 07:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c666d17828d3714d010c585e0121e681 SHA-1: d0fb4ee8a0b660bc7e0d0e43b32192039abbfd02 SHA-256: cd85ffacb1c0fb4e5ad3b5c7c645db4a73efbbf536b389f24a6d7002e62d4fc3
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the presence of external URIs and the overall classification suggest this PDF is designed to redirect users to malicious content, potentially exploiting PDF vulnerabilities.

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://nipisod.ru/strik?utm_term=why+is+junie+b+jones+a+banned+book
    • http://proita.space/how_to_make_epsilon_sign_in_latexpofjb.pdf
    • http://p-kavkaza.ru/best_build_for_curse_of_strahdkft34.pdf
    • http://lodemazupunogas.iblogger.org/vivid_verbs_list.pdf
    • http://dektesheff.xyz/tepunivibilaxisute4m1t2.pdf
    • http://hookup157.online/9698161276vpk5p.pdf
    • http://lovechat24.club/stickman_legends_shadow_wars_hack_apk0m5s3.pdf
    • http://iminn.ru/how_to_write_a_slam_poem_about_bullying6tvvs.pdf
    • http://voiprormul.xyz/majezijinipidurifabiri92jkh.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://995be609-08d3-41b1-a6c0-90e53670bcec.filesusr.com/ugd/9988e1_69c5d9478e824d33a17e8c78c1209b8c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/15297313-9527-4544-80c0-57bab29a709d/3042680085.pdf
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_a33dcb0dc0214790854a5b370aa4124a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1907ac02-940b-4902-8860-9c271f90b290/ravarep.pdf
    • https://uploads.strikinglycdn.com/files/87f46800-d922-4899-96f7-826a2e7264fc/kujug.pdf
    • https://uploads.strikinglycdn.com/files/9981795e-cbd7-4dd3-b081-2eeb2b52b735/equate_wrist_blood_pressure_monitor_error_3.pdf
    • http://ramamezez.rf.gd/83411049047.pdf
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_a3ea7bdfd1224373841680c5137d6b99.pdf?index=true
    • http://vorasatijede.rf.gd/introduction_to_mathematical_programming_winston.pdf
    • http://tuzuvas.rf.gd/number_line_to_10_000_worksheet.pdf
    • http://roxunir.epizy.com/avatar_full_movie_filmyzilla.pdf
    • http://seluxud.epizy.com/how_to_find_number_of_atoms_from_mass.pdf
    • https://uploads.strikinglycdn.com/files/84fdd6e0-5aa5-4788-8876-ea7651379d49/what_is_the_formula_for_volumetric_efficiency.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_off0000ea22.bin
38b0f78716b7f26b4503f50633341067a7c3f0e8d335d81df94611216634d4ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA22 5180 bytes
font_01_sfnt_off0000fbd7.bin
21ccaf6dc848e4910b3947d4e39e9a8f3646bed1a56bda4210a88fb5aa68daee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD7 10628 bytes

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