Malicious PDF — malware analysis report

Static analysis result for SHA-256 3702d86a238ab712…

MALICIOUS

PDF

72.1 KB Created: 2021-02-23 02:27:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 439b4cdc04dcac5d1b6eaa9aa70abb6f SHA-1: 77504475931bf76d2a3cda9e0a743d338c3c24a5 SHA-256: 3702d86a238ab712ddb40607ec5dfa73eace891cdd5fdbf5fb065e335183af22
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'outdoor survival knife brands', likely a lure to entice users to click the malicious link. No scripts were extracted, but the presence of the malicious URL and the ClamAV detection strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=best+outdoor+survival+knife+brands PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413977/normal_5fea001b4a8e6.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/gfe7mwz/lizeled.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493578/normal_5fd79b7cc9b31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392210/normal_602093374c937.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385424/normal_5fe16f3ab5752.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/4hibVRz/xbox_series_x_controller_price.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425010/normal_602b95b97d69f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420600/normal_5fe159309531b.pdfIn PDF document text
    • https://cdn.sqhk.co/nubenirosife/f9mogjX/kujujujakiwak.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/ieVugha/jivovufagojo.pdfIn PDF document text
    • https://cdn.sqhk.co/rubogomuweme/dvmgijc/auto_racing_best_car_movies_on_netflix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://botadepano.epizy.com/dekatixolefi.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/custom_back_button_in_toolbar_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/budagakodexupasaxunadiguj.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/chughtai_lab_view_reports_patient.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/suvagivobupuwaxaxif.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/commas_in_lists_worksheet_ks2.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ded4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED4 5212 bytes
SHA-256: b400b28bded25ac6826472c17d26ee163d4ca0611824b41c317f9cd663c95802
font_01_sfnt_off0000f0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A3 10252 bytes
SHA-256: 6cf2b838bf7afd4fd1f004d61fe337cccad8dd1c62e68dc335b6d998868b5886

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