Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1cb4cfe371cc3bb…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 07:07:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f42274fcf3d373c82b29f16ce43a3b7e SHA-1: 88bb3ae6e4b74d20a5e97163bacd2f70027f9d99 SHA-256: a1cb4cfe371cc3bb421d23f85684dcec7fc89b975c77642316de519aac09698a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free generator / game hack', directing users to a suspicious URL. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to a malicious site, likely for credential harvesting or further malware delivery. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.online/app/479516143/do-you-get-minecraft-windows-10-for-free-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-earner_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-pet-food-free_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-apps-that-actually-work-quick-download_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
stream_004_off000054b2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54B2 25624 bytes
SHA-256: 00a21430c4176e93d41ec4c7f164bef56f903a125851352a09164043451e57ff
font_01_sfnt_off00008e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E65 18996 bytes
SHA-256: 6efb8ecb4dc6f7e27f52b3317fae0c9f285348f122a83a6c92def46bb9593e98

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