Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc77162ac578be21…

MALICIOUS

PDF

82.6 KB Created: 2021-03-25 08:33:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f2bb07069a4038260625014684c36db SHA-1: 9b6569a06a24b16e0ed71d98a1dedba5fc68fb4a SHA-256: fc77162ac578be2148db4de261ea83822bb78be47942e17e1de6473ee653d6b8
136 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. Heuristics indicate it uses an MFA or one-time-code harvesting lure, consistent with credential phishing. The embedded URL 'https://dafemum.ru/award?keyword=b.+com+3rd+sem+result+2020+pdf' is the primary indicator of a phishing attempt, likely leading to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/award?keyword=b.+com+3rd+sem+result+2020+pdf
    • http://tidirakozodawon.getenjoyment.net/10197204196.pdf
    • http://pofitasexa.iblogger.org/ubd_design_template_blank.pdf
    • https://cdn.sqhk.co/xibetevoxaj/b0VkbRW/bekuxekuvukepabapuliwokaj.pdf
    • https://cdn.sqhk.co/wobuwaseja/gc9Shj9/89967225190.pdf
    • https://cdn.sqhk.co/gajalalike/shhhg15/mixul.pdf
    • https://cdn.sqhk.co/liwewajawab/jjhLJic/nafinukiw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pilazi/temporary_employment_contract_template_malaysia.pdf
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_6a3935782592407182dd1fbbe8c1a797.pdf?index=true
    • https://0f424234-9c27-4462-a606-4b2ccecf17d8.filesusr.com/ugd/b42a09_872a0ed427c74a5e9356ab0d7df91f04.pdf?index=true
    • https://8909b315-4d59-4940-aabf-0fdaa532e0ad.filesusr.com/ugd/4542d9_67752dfa104b4f5abcb09e115d623e43.pdf?index=true
    • https://s3.amazonaws.com/farokof/23991705440.pdf
    • https://s3.amazonaws.com/zoromexemuzid/project_performance_assessment_meaning.pdf
    • https://uploads.strikinglycdn.com/files/093e6da7-8a31-46ef-959d-4f08537a3264/suzosumekopugebejekuwiw.pdf
    • https://uploads.strikinglycdn.com/files/377d9eba-4f8e-40b8-8d8d-4f62b8ff76d1/starcraft_2_units_zerg.pdf
    • http://viniwowosur.onlinewebshop.net/titewu.pdf
    • http://nobejivit.rf.gd/bodmas_questions_for_grade_6.pdf
    • https://s3.amazonaws.com/varolexexus/woodland_grange_primary_school_ofsted_report.pdf
    • https://uploads.strikinglycdn.com/files/a4dd494a-d36d-418f-a4d8-9f0fff0aac04/material_science_and_engineering_jobs_in_ghana.pdf
    • http://bibarixe.epizy.com/sofinilifabineme.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efe5.bin
865e92bf453287ae4b1c3988b85047b6fca65a8ff870e9286f6a8e77e0cad1ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE5 5612 bytes
font_01_sfnt_off000102f3.bin
d58ae8864adb2d85498a37e0a14083b8782e8f5b4dff697994aa6a38afd9609e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102F3 10620 bytes
font_02_sfnt_off00012768.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12768 16204 bytes

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