Malicious PDF — malware analysis report

Static analysis result for SHA-256 36f050445492f594…

MALICIOUS

PDF

71.5 KB Created: 2021-01-02 08:52:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: dd0204a567a10e4e18d609b149cb25d2 SHA-1: d4545fbf8237b585c84c2452028449e9b4ca2af2 SHA-256: 36f050445492f594d0170035f5a5d7dc59152d722611b96e223e2bdc4285259b
154 Risk Score

Malware Insights

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

The PDF file contains a malicious link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, appears to be a lure for a movie download. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/123?utm_term=harry+potter+and+the+sorcerer%2527s+stone+full+movie+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378382/normal_5f9d6382d2793.pdfIn PDF document text
    • https://cdn.sqhk.co/menasimax/heMm4bz/rutoniva.pdfIn PDF document text
    • https://cdn.sqhk.co/fegujajox/ijgijbL/swordigo_walkthrough_chamber_of_the_mageblade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5fc17a2660439.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/0114474e-face-4a50-9b86-0810cc363b40/jakug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fae9fbe-e8f8-4167-a0bf-7734efe72944/wavin_flag_mp3_download_fusionbd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e0e777a-e235-47e1-b004-6d69a369205e/the_american_challenge.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/2397579769.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/word_powerpoint_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/9030466900.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/kizujisokokelimima.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/wezovarigiwaligorofiw.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_off0000d9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C8 5552 bytes
SHA-256: f3542300bcf2e5242d36cf3f75b364aa30141b3aff1baed59ccedb228fc57a97
font_01_sfnt_off0000ec98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC98 10688 bytes
SHA-256: 77bdd16c51f1cc9a29460e21a1a775eb538211e30d4e9f3b86a6521abfd46f3f