Malicious PDF — malware analysis report

Static analysis result for SHA-256 73804e29c98d9eb8…

MALICIOUS

PDF

43.5 KB Created: 2021-05-15 14:04:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8a5670926111f9b897be9f2670063fed SHA-1: 7a805628574d55c61022e010185dd7c45f6059c0 SHA-256: 73804e29c98d9eb8723dd5a45394a6702e39dadc4e4334cda80b8d72c739058e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/431946152/free-robux-2021-game-hack In PDF document text
    • http://bf-sozidanie.ru/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/robux-com-free_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/robux-free-com_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/how-to-robux_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/50-free-spins-coin-master-links_GM406889139.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_off0000473a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x473A 27412 bytes
SHA-256: 44877e2f474130d339c38e3854b84835f1b9d7cb134a26abd27f47ed1ba8773a
font_01_sfnt_off00008724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8724 18416 bytes
SHA-256: a2c808792aaeb1607b9c3a91ae122c662faffffe8d42f3cf4118be6ccc5b3e7b

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