Malicious PDF — malware analysis report

Static analysis result for SHA-256 b869bfc38aa6c80b…

MALICIOUS

PDF

37.8 KB Created: 2021-06-25 17:01:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 152a86679867dc67a3433d6b2ff60495 SHA-1: feb82e23be2cf5d3fe5a946841aa54edee0e94d4 SHA-256: b869bfc38aa6c80b5445e92265c75b4ebd937fbef0bdf0d489228b146c5da24f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as a generator for free game currency. The primary lure is a link to 'free Roblox gift card codes 2021 unused game hack'. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attack aimed at redirecting users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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/free-roblox-gift-card-codes-2021-unused-game-hack In PDF document text
    • http://library.stembi.ac.id/repository/redline-32-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-robux-free-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/hacking-giving-my-fans-robux-inquisitor_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-get-free-robux-without-downloading-anything-2021_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-roblox-outfits-for-boys_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-get-free-robux-2021-nove-ber_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/como-hackear-cuentas-de-roblox-facil-y-rapido_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/thumbnails-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/what-are-some-cheat-codes-for-destruction-simulator-roblox-codes_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-sad-cheat-story_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-make-your-own-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/do-you-want-free-robux-get-unlimited_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-promocode-roblox-november_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-free-play_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-alts-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-money-boku-no-hero-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/nonhacking-and-or-inspecting-for-robux_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_off00003be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BE4 22184 bytes
SHA-256: 4e6281d01e8009417401910cf48e50a21ecf4a665a79bc8dfa4b71fda4462892
font_01_sfnt_off00006d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D14 19588 bytes
SHA-256: d0050b22b1575b026cda5754e18fa76c7d99fd57f12d326042661e7eeaa340ba

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