Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd6a41ddc672d72…

MALICIOUS

PDF

81.3 KB Created: 2021-03-20 06:09:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc27df78fb281090078cfa0e36b1327d SHA-1: ec1f973814249b19fcc0d8ffe3febc808e59f528 SHA-256: dfd6a41ddc672d72a160165dd1f260322b7b1ab4c2c02034fd0a6fc2a66678f9
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a malicious domain, likely serving a phishing or malware payload. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=what+is+big+data+analytics+in+simple+words
    • https://cdn-cms.f-static.net/uploads/4461744/normal_6010c511c1f06.pdf
    • http://tolebexeju.22web.org/1995_buick_century_service_manual.pdf
    • https://static.s123-cdn-static.com/uploads/4497348/normal_5fc9f6a1cfeff.pdf
    • https://cdn-cms.f-static.net/uploads/4409614/normal_600d34530966f.pdf
    • http://zosuzalazuxobob.iblogger.org/20228511054.pdf
    • https://cdn-cms.f-static.net/uploads/4418391/normal_5fda8fac3e52b.pdf
    • https://static.s123-cdn-static.com/uploads/4454172/normal_5fd0704204fc2.pdf
    • https://static.s123-cdn-static.com/uploads/4402933/normal_5ff25c2b8624c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/f82dbb8a-91c3-43f5-8585-c7faec801ea2/xazotin.pdf
    • https://uploads.strikinglycdn.com/files/ba474010-8e45-40a8-a0da-94e4a73863ba/which_invicta_watch_is_best.pdf
    • http://zovebosovu.rf.gd/chopin_ballade_3_sheet_music.pdf
    • https://uploads.strikinglycdn.com/files/7014904d-cdf1-4300-ba7d-428d2f04231c/75696133822.pdf
    • https://uploads.strikinglycdn.com/files/cb0418e4-65c3-4c63-8494-5033aa76bbcd/kiret.pdf
    • https://uploads.strikinglycdn.com/files/93e26988-b9b5-4b1b-80b0-dc7c79f0a9ee/ninja_professional_1000w_blender_bl610.pdf
    • https://uploads.strikinglycdn.com/files/e9a2fcdc-b9bd-4ac1-b935-a2af2a586e90/how_to_use_my_cloud_home.pdf
    • https://uploads.strikinglycdn.com/files/d5067604-1318-451d-9769-ac52dbd0c1f5/4313182103.pdf
    • https://uploads.strikinglycdn.com/files/acbc5390-4b16-40bc-949c-1bbd33070952/verbos_irregulares_en_ingles_past_tense.pdf
    • http://xekujigifur.epizy.com/31376928522.pdf
    • https://uploads.strikinglycdn.com/files/dc64de21-8089-42b6-bf56-f3e83739c7bc/actores_de_la_casa_de_espiritus_malignos.pdf
    • https://uploads.strikinglycdn.com/files/1baf8350-3e8a-426c-9d7a-a53923f97764/bravos_xl_washer_code_f51.pdf
    • https://uploads.strikinglycdn.com/files/ca72aaa9-3c7e-4f61-b167-c3ffb9e9d93e/el_desafio_del_amor_dia_11.pdf
    • https://uploads.strikinglycdn.com/files/f394144b-9d85-4a88-a013-a60cc418cbcb/the_game_awards_2019_fortnite.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee52.bin
9fe8696db018c38833c1c108102e1b72034ae0dad9e2a9c5935c064c7919fa98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE52 5620 bytes
font_01_sfnt_off0001014b.bin
57ea61bb440ab0614ebf12d55bc10b61feadc376879c7d99e30f63594baf22bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1014B 11240 bytes
font_02_sfnt_off00012779.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12779 4324 bytes

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