Malicious PDF — malware analysis report

Static analysis result for SHA-256 cabff6b9236c53f5…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 11:15:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1d3d835fdc9cc205e067f3984a0d6905 SHA-1: a9e2e46f5ec3ce97b86d11262c5342e67d34bd33 SHA-256: cabff6b9236c53f5cd7bd41276f7e88c27173fdfc408618f03bc04d3da4c9bda
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/claim-free-robux-game-hack PDF link annotation
    • http://lib3tell.stptrisakti.net//repository/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/roblox-imagine_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/robux-offer-wall_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-robux-site-cashforapps_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/rbx-claim_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/rich-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-coin-master-glitches_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/how-to-get-any-gamepass-for-free-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/roblox-dance-your-blox-off-cheats_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/how-do-i-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-spins-and-coins-coin-master_GM406889139.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_off0000312e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312E 22060 bytes
SHA-256: 5ba1427d38074e97f48f6e642c3cbb4135c97f4c20aaec3b5fa228025c8d67c6
font_01_sfnt_off0000621e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621E 19168 bytes
SHA-256: dfc8721fbf6b4988d00971a58b16fe325011594e1ee6efadf5a4fdcf2df05fca

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