Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f01e8a5d191bf5…

MALICIOUS

PDF

93.8 KB Created: 2021-05-20 09:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 24a0213abfa2f901b9aa66c57944d873 SHA-1: d550a0a986e65dd83a45b461c26451f21c6b4566 SHA-256: 26f01e8a5d191bf5eba8e38ebd3a5d59260f6bd50fcfd45f1efca91a1bd98c2f
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'mezovuduw.ru/strik', which is likely a malicious download link. The presence of a 'Download Button' heuristic further supports the phishing lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mezovuduw.ru/strik?utm_term=summertime+saga+0.17+5+save+data+android+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403121/normal_604ee64412a3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446636/normal_601e7958781df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425913/normal_6039ab37ce365.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/20de25e2-b0c2-4382-9434-59094a3773b2/the_norton_shakespeare_3rd_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/alternaria_fungi.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/factores_biopsicosociales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b48aa362-1171-4528-99df-85370eeaae9f/bowflex_pr3000_box_dimensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b236ead-65f1-4743-a3d3-4e3d4ff14804/60843788337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a50b7be-6388-4c1f-bc08-e07a85c6b5d0/maytag_bravos_washer_manual_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e67c82c-9f72-4ea3-8de7-25504ad4643a/language_as_symbolic_action_burke.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/opener_filmora_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/deadpool_trailer_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b52e0fa-7b02-4bf3-beb5-97e79e563a4b/52343022935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb0d1a6d-b293-48c8-8f95-e386a3586a36/lelijikunipexowuwatab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdbea41e-598a-4db7-b421-3cbd53c1c568/xuwaxaxenekirumarurawu.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/blowfly_life_cycle_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/57787387985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29c77a0c-9026-4c03-be47-5354b90951c3/sagibodobedumin.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/badigilibipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f293f2b-aefb-475f-a930-cacd2c719b52/cuantos_metros_hay_en_un_milimetro.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/precalculus_texas_edition_textbook_answers.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE57 2988 bytes
SHA-256: d774ea35627c636b60b67efcb19233550797bc3630d6d7476e68a1591658f61e
font_01_sfnt_off00010907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10907 5832 bytes
SHA-256: 68a9cf1de810dfd704a70e55e7e11af1fbd4028709edb88cc2b8b61e8fe31dfc
font_02_sfnt_off00011ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE5 3456 bytes
SHA-256: 46938ee409c19d857ae70c333587937c228bd12cbec70029f6822cfe793bdff8
font_03_sfnt_off00012ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD4 11800 bytes
SHA-256: 8f3023adc4d4b289f3bb40cdde8351745a07fae0cc1a9003bf7cee2b0a7bb19b
font_04_sfnt_off00015251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15251 16444 bytes
SHA-256: f964aa140be83b3391f3a60ea7574c7747be90f68dd080b170a19b8450d4d315