Malicious PDF — malware analysis report

Static analysis result for SHA-256 41443b3ced4bf439…

MALICIOUS

PDF

35.2 KB Created: 2021-06-18 06:11:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 331b7c29bb5089455131eab49ccf764c SHA-1: a3ea5411c20cb7e06cf5361fa3f562f66b316dc6 SHA-256: 41443b3ced4bf439c89b300ef268531d9b672d9fb744b4236de8ff97a72882a3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and websites offering game hacks and cheats, such as 'roblox-hack-descargar-2021-game-hack'. The presence of these links, combined with the ML classifier flagging it as malicious, strongly indicates a lure to download potentially unwanted or malicious software. No scripts were extracted, but the document's structure and embedded URLs point to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/roblox-hack-descargar-2021-game-hack In PDF document text
    • http://santeh-40.ru/images/roblox-cheat-name_GM431946152.pdfIn PDF document text
    • http://santeh-40.ru/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://santeh-40.ru/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://santeh-40.ru/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://santeh-40.ru/images/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://santeh-40.ru/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://santeh-40.ru/images/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://santeh-40.ru/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://santeh-40.ru/images/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://santeh-40.ru/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://santeh-40.ru/images/roblox-adopt-me-cheat-codes-2021_GM431946152.pdfIn PDF document text
    • http://santeh-40.ru/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://santeh-40.ru/images/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • http://santeh-40.ru/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://santeh-40.ru/images/robux-app_GM431946152.pdfIn PDF document text
    • http://santeh-40.ru/images/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://santeh-40.ru/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://santeh-40.ru/images/zephplayz-free-robux_GM431946152.pdfIn PDF document text
    • http://santeh-40.ru/images/free-robux-no-offers-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://santeh-40.ru/images/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B7 22804 bytes
SHA-256: 1120d69846cbad753bbe41f3eda8238a8191d4c39af798116682f630768156da
font_01_sfnt_off00006476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6476 19040 bytes
SHA-256: 8d0a984a4adc40199e00d46bcfd20e6e9d29f21c1a4cda77d12f4b88fe71268a

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