Malicious PDF — malware analysis report

Static analysis result for SHA-256 3004fe75a66583d9…

MALICIOUS

PDF

79.5 KB Created: 2021-03-29 12:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b2abced488dab9134e9992c32338b00 SHA-1: d87a5e896a400e536628f7e450648ea28b1461b6 SHA-256: 3004fe75a66583d9355be7a576e552e5c3e7ad4484151b37354c56e5a21f7c47
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious domain, identified by both heuristics and a machine learning classifier as malicious. ClamAV also detected it as a phishing trojan. The presence of multiple unknown URLs further supports a malicious intent, likely to redirect the user to a phishing site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/award?keyword=sources+of+bioelectric+potentials+pdf
    • http://retys.fun/84769538762lw396.pdf
    • http://leadtop.co/gadebobineninopevuj97qri.pdf
    • http://matteset-spon.space/syma_x5c-1_rc_quadcoptercq70x.pdf
    • http://sdfafq.info/rakujobudas1fau7.pdf
    • http://tesar-krd.ru/61222102478xk8g5.pdf
    • http://naxawibumeso.iblogger.org/enjoy_the_presence_of_god_verse.pdf
    • http://myfirstsite.xyz/what_should_i_write_a_letter_to_a_soldier15nak.pdf
    • http://sakhavto.ru/73667149327oes0r.pdf
    • http://world-wild-shop.com/30640457021awlhj.pdf
    • http://sotokonezur.22web.org/xipowuzuxaji.pdf
    • http://izzzaaa.space/74293171707lt9qp.pdf
    • http://repair-kvadrokopterov.ru/mirro_matic_pressure_cooker_gaskets5jxc6.pdf
    • http://clyb-wylcan3.space/bns_launcher_errors1857.pdf
    • http://ch-data-2a8fv9s.pw/hoteles_baratos_en_centro_spokane_wauotu1.pdf
    • http://eurofamily.pro/grange_park_primary_school_telford_ofsted_reportmefve.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b55ed5f6-67bf-4ef1-aec5-1830f9bf872f/mesov.pdf
    • https://uploads.strikinglycdn.com/files/29889395-1df4-4b06-9512-c9748aee8052/53055950160.pdf
    • https://uploads.strikinglycdn.com/files/48a6a00f-4ff9-4392-b90a-6decc02f2c4a/is_the_female_brain_rated_r.pdf
    • https://uploads.strikinglycdn.com/files/183e48ac-59dc-4890-b15a-932944c3b603/56633347654.pdf
    • https://uploads.strikinglycdn.com/files/c54257a3-fef9-4e20-9b03-b4a49e52a989/let_the_right_one_in_book_eli_castration.pdf
    • https://uploads.strikinglycdn.com/files/77c61687-9b7b-40d2-9f73-703d3315bed0/nabulonelabigumegude.pdf
    • https://uploads.strikinglycdn.com/files/010f84fe-0204-45b8-b79a-ce17c128a747/what_questions_to_ask_when_buying_a_business.pdf
    • http://bikufupok.rf.gd/7278765591.pdf
    • https://uploads.strikinglycdn.com/files/46fc711a-8ed9-439e-b3f9-3ff9636e6b53/apples_and_oranges_international_comparisons_of_covid-19_observational_studies_in_icus.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_off0000f6eb.bin
b6211c13c0f9e1ddcc0f937dc545c9ecfe0e37062dc2c22a7b1c8b35e614fcfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EB 5392 bytes
font_01_sfnt_off00010944.bin
8ef080c19d125d694b4b0091e8c31c455ca37deadb18384c59895b7fe9cccc45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10944 11300 bytes

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