Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a759c6023a2863a…

MALICIOUS

PDF

44.6 KB Created: 2021-06-07 20:57:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8575186c0139e4c993adaf4037f7fe66 SHA-1: 7f6f7c88dd7dec5a78b6e4c6ea2903368a67122c SHA-256: 8a759c6023a2863a185b95a694b3ad43c1b512cb214d1f424522cbc7ee04d71a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'generators' to lure victims. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful websites. While no scripts were directly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/one-piece-millenium-roblox-hack-game-hack In PDF document text
    • http://bgnails.nl/images/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-minecraft-skins-ps4_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_004_off00005292.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5292 24200 bytes
SHA-256: d6ae241b72551440d938710a976889501c38dddb9600831efd6acc7ca55c2b4a
font_01_sfnt_off000089cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89CD 19052 bytes
SHA-256: 3dbf964b54a51e93d0bbb21cfb6ac49ef3111618b99f9356e94c5c85d91b064b

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