Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be5b704ab534120…

MALICIOUS

PDF

103.1 KB Created: 2021-01-24 03:05:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a3c2e55409acebc168eda74b6972cb79 SHA-1: a4dae7f69d3dcaebeb071bc7db41f76773543ad6 SHA-256: 0be5b704ab5341208224d76a0d9a1454f549432e37d0a1aee8150463846bc1fd
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/wb?keyword=impulse%20response%20of%20analog%20filter%20matlab'. This URL is the primary indicator of malicious intent, suggesting the document is designed to lure users to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/wb?keyword=impulse%20response%20of%20analog%20filter%20matlab In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384835/normal_5fe8b8b9b4346.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461484/normal_5fecd5193e38e.pdfIn PDF document text
    • http://fiduvizowema.iblogger.org/car_title_transfer_form_minnesota.pdfIn PDF document text
    • https://site-1168265.mozfiles.com/files/1168265/novomejuponixemujepavuta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486748/normal_5ffeafe3292ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381294/normal_5fd1910dd80b5.pdfIn PDF document text
    • https://site-1166616.mozfiles.com/files/1166616/afcent_reporting_instructions_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499329/normal_5fd3dae41e41e.pdfIn PDF document text
    • https://site-1178187.mozfiles.com/files/1178187/robocar_poli_space_monster_popular_games_2018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/84106858502.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/games_like_breach_and_clear_for_android.pdfIn PDF document text
    • http://vizepojuduw.rf.gd/51830822138.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/tourist-_information_bttcherstrae_4_bremen_ffnungszeiten.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/nujegidezurilenidubuwese.pdfIn PDF document text
    • http://budunasetixap.epizy.com/zawixuzurojel.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13730 5296 bytes
SHA-256: 0993ea11641f07b1c9e5d7b134ea5cb9c064a50f25c7016f3fc11fea75ab963c
font_01_sfnt_off00014918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14918 14512 bytes
SHA-256: 9c9913e92f49966f31a289f7a6fdabbb3b2498bf50c34b118f9b97fefe5908a8
font_02_sfnt_off0001798f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1798F 16132 bytes
SHA-256: d66640a9a7608bb8955317166933a631995f903b89204cb24a1fc6d69081da6b

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