Malicious PDF — malware analysis report

Static analysis result for SHA-256 972152995f419f3c…

MALICIOUS

PDF

71.2 KB Created: 2021-02-25 00:16:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3fb44aca175c1e6926cbd13f3323af78 SHA-1: d3327234e4b3bc3515460de7a11352dd55f853a7 SHA-256: 972152995f419f3c86a07c81324eb784273358e04727923cb225bd3791eb1121
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firings suggest the document is designed to redirect users to malicious infrastructure, likely for further exploitation.

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
  • 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://yafferge.ru/123?utm_term=shoe+manufacturing+company+business+plan In PDF document text
    • https://cdn-cms.f-static.net/uploads/4475739/normal_602776d89198a.pdfIn PDF document text
    • http://maykistore.ru/isometrico_instalacion_sanitariadpwrf.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvifilezaja/ia8gdsp/81508227692.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/fgjghjj/polaroid_originals_colour_film_for_i-_type.pdfIn PDF document text
    • https://cdn.sqhk.co/suwajipox/3XSoCjc/80553590544.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375352/normal_6012f96000565.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382201/normal_5ff6a90d8e7bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456379/normal_5fed4b2739ca6.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/i6R01jt/download_crash_dive_full_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tejikeluz/NghYpgj/forest_stream_live_wallpaper_weather.pdfIn PDF document text
    • https://cdn.sqhk.co/sajatanugeg/piAhagj/fipojajujarinuxoz.pdfIn PDF document text
    • http://pristav.pro/ejercicios_de_operaciones_combinadassjwm5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383321/normal_5fff4c7c52f03.pdfIn PDF document text
    • http://firstsecu-paypal.com/stupid_zombies_4_mod_apk_all_unlockedwv7t1.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/6hiAA6L/lupotusemopure.pdfIn PDF document text
    • http://smartbright.club/mufezadu77ndd.pdfIn PDF document text
    • https://cdn.sqhk.co/wujejelot/gdACexa/word_cookies_game_download_for_computer.pdfIn PDF document text
    • https://cdn.sqhk.co/xokekekav/fS5fE36/zerolirota.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AC 5776 bytes
SHA-256: 3d9961d284f3972dc4bc5d96f76bcaf21c7a935199cd17c4baf1b767a2765539
font_01_sfnt_off0000ed30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED30 10168 bytes
SHA-256: 01100a37db6e05e98c63cd7c2b572379e628bbce76c4677d1f6b52813811644a