Malicious PDF — malware analysis report

Static analysis result for SHA-256 2922ef86ba213ad0…

MALICIOUS

PDF

33.8 KB Created: 2021-06-18 21:34:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f0e1c81d28c46ee2655589a7c3216c76 SHA-1: 97d6f764f4c72921ce10bfdbca79161ed3825800 SHA-256: 2922ef86ba213ad0789cf3709dc30b5d002cabd0f5a268ce80104c7dc4bfc5ea
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a malicious redirector link, specifically luring users with promises of game hacks and free currency. The document body and embedded URLs reinforce this by pointing to sites offering 'free Robux' or 'game hacks'. While no scripts were extracted, the primary function appears to be redirecting users to malicious infrastructure.

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/howto-get-free-robuxon-roblox-game-hack In PDF document text
    • http://katalog.ireyogya.org/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-face-roblox-girl_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-sad-cheating-story-albert-he-cried-on-video_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/website-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-robux-in-roblox-2021-may_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/optifine-pe_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-robux-easy-2021_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_off00002fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFF 21376 bytes
SHA-256: ae96db789bdd4fe1367079521001785e57aac4f12162bd36a6c5d38311392791
font_01_sfnt_off00005ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBD 19056 bytes
SHA-256: 5b888153347703ac5bd421b373dace8819f0891ee4f8c4b4529688979488cc62

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