Malicious PDF — malware analysis report

Static analysis result for SHA-256 40f46bb54214d60c…

MALICIOUS

PDF

33.6 KB Created: 2021-07-19 05:05:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 881a0560b02c2f48d712333fbc7da6db SHA-1: afb4adc367ae4d355253441a6dd5351ce87f2bab SHA-256: 40f46bb54214d60c30352a939e967f69ad290c4d14df099702fbc54c0694eaf9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free currency to entice users to click on embedded links. The primary link directs to a known malicious redirector infrastructure, which in turn serves other malicious PDFs. The document body and heuristics indicate a clear intent to lead users to potentially harmful content, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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.
  • 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
  • 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 http://netcdn.tw/app/431946152/how-to-hack-roblox-accounts-2021-game-hack In PDF document text
    • http://sbm-nn.ru/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000029b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29B6 23224 bytes
SHA-256: ea1f7064c959e85744a317756187caf8b1002a1c8adf1453cdec3aabd8a1c824
font_01_sfnt_off00005e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E54 19176 bytes
SHA-256: 6f1be2f53e78d2232c4cc8701dc2ebda7fd96dce4e81a36b526c0c8f5bd1c790

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