Malicious PDF — malware analysis report

Static analysis result for SHA-256 839816a40789f8ea…

MALICIOUS

PDF

35.0 KB Created: 2021-06-18 18:51:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 38221f9f529551bc5d92f95729fac7fe SHA-1: e173e9a394cb74250d7dd8c2697edfde05759b72 SHA-256: 839816a40789f8eaeddb6c96e9fc2f4daa34b52afe7fe430c5a81e1f7c1c6b17
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically advertising game hacks and cheats. The primary lure is a link to 'pokemon-brick-bronze-roblox-cheats-game-hack'. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack designed to lead users to potentially harmful content or further malicious downloads.

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/pokemon-brick-bronze-roblox-cheats-game-hack In PDF document text
    • http://lawpatron.ru/images/pubg-70-uc_GM1330123889.pdfIn PDF document text
    • http://lawpatron.ru/images/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://lawpatron.ru/images/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • http://lawpatron.ru/images/roblox-music-player-hack-2021_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/free-roblox-noclip-hacks_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/hhow-to-hack-on-roblox-wild-savannah_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/free-roblox-promo-codes-september-2021_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • http://lawpatron.ru/images/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/free-minecraft-account_GM479516143.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
stream_002_off00002f0d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F0D 23168 bytes
SHA-256: a11dcfa8494f6c2120b49839a7dcd3e51943afca0195d81cf0ef6bd39a50feb3
font_01_sfnt_off0000631a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x631A 19356 bytes
SHA-256: 04a7bdf1803e59a6b82e37887b24fdde0fcf708195a5f64a136d44eb3ebc186c

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