Malicious PDF — malware analysis report

Static analysis result for SHA-256 864050a2e265415f…

MALICIOUS

PDF

78.7 KB Created: 2021-04-02 00:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b7be39e5dc91b7cf38344e40a2f2dc9 SHA-1: efc159d9145fed2d32f13b785e3d636634129ba2 SHA-256: 864050a2e265415f6c7b5cce24abf3887e9885989f77692d5b3ca5185f4cf7f1
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample was flagged by ML classifiers and ClamAV as malicious, with a high-severity heuristic indicating a payment redirection lure. The embedded URL `https://kuzutuzo.ru/wix?keyword=apk+editor+pro+gratis+full` suggests a phishing attempt related to financial transactions or account changes. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing attack designed to trick users into compromising their financial information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://kuzutuzo.ru/wix?keyword=apk+editor+pro+gratis+full
    • http://igafnd.org/mivogigukexapizekebibovc0md.pdf
    • http://de-bewertung-id-q2e5t23.top/nissens_catalogq20jq.pdf
    • https://static.s123-cdn-static.com/uploads/4372360/normal_60077237b05d8.pdf
    • https://xexemisekugo.weebly.com/uploads/1/3/4/6/134679242/4f09e028d8.pdf
    • http://mrshadow.net/805788700663jm8i.pdf
    • https://bosudire.weebly.com/uploads/1/3/4/4/134456289/fizemaneramebo_fenosiduw_judebewugo.pdf
    • https://teregurejojexol.weebly.com/uploads/1/3/4/8/134879353/2869590.pdf
    • http://lnstagramverifiedbadge-form.com/99687854527wrq32.pdf
    • https://cdn.sqhk.co/fejisedetu/j6zEjiI/christmas_grocery_shopping_list_printable.pdf
    • https://cdn-cms.f-static.net/uploads/4423148/normal_603d1fa3e12d6.pdf
    • http://b2b-servis.ru/organizational_behavior_an_experiential_approach_8th_edition_ebookg0lei.pdf
    • http://sokfresh.fun/salamander_dichotomous_key_worksheet_answersy02w4.pdf
    • https://cdn.sqhk.co/guzunilepin/hchWhdg/nonukozobaxexarimevosewug.pdf
    • https://cdn-cms.f-static.net/uploads/4481667/normal_60169484891df.pdf
    • https://cdn-cms.f-static.net/uploads/4383566/normal_601ae051c49bb.pdf
    • http://damvglaz1.xyz/class_11_english_book_state_board0ph3k.pdf
    • http://ehaberdevlet.com/amcrest_ip2m-_841_firmwareeef9f.pdf
    • https://bokonuso.weebly.com/uploads/1/3/4/6/134604328/9783349.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wiwuxot/electrostatics_multiple_choice_questions_with_answers.pdf
    • https://s3.amazonaws.com/mejados/club_car_onward_electric_speed_upgrade.pdf
    • https://s3.amazonaws.com/purawuma/conservation_of_mass_balancing_equations_worksheet.pdf
    • https://s3.amazonaws.com/baposivarabuj/schwinn_270_stationary_bike_parts.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_off0000e9a5.bin
7cc326a2d0f28fb15fabb4e9298376698f79e1e132cb48acb8e2de72b069960b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A5 5260 bytes
font_01_sfnt_off0000fba1.bin
26b7d98b823e5bdffe1d762a9d312dfdb13562d193cab1879ee10ecb10ab8282		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA1 21800 bytes

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