Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff88ee4103fbb9c2…

MALICIOUS

PDF

42.3 KB Created: 2021-05-14 01:38:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 59b98a7b19662ff2d2f7db81abc4135b SHA-1: cad0af0185665f5650b7d934ae281f9dc37c6b63 SHA-256: ff88ee4103fbb9c2b89ea515bdc3f5e9366b9fea5f253a51c7a0909afab2f227
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure of free game items and hacks to redirect users to external websites. It contains a large number of SEO-optimized PDF links, suggesting a link farm or content-stuffing operation. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a malicious intent to drive traffic to potentially harmful or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.xyz/app/431946152/free-roblox-clothes-boy-game-hack PDF link annotation
    • http://kalaydova.com/images/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://kalaydova.com/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://kalaydova.com/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://kalaydova.com/images/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://kalaydova.com/images/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://kalaydova.com/images/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • http://kalaydova.com/images/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://kalaydova.com/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://kalaydova.com/images/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • http://kalaydova.com/images/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://kalaydova.com/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://kalaydova.com/images/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • http://kalaydova.com/images/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://kalaydova.com/images/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://kalaydova.com/images/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://kalaydova.com/images/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://kalaydova.com/images/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • http://kalaydova.com/images/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • http://kalaydova.com/images/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://kalaydova.com/images/how-do-you-get-free-robux-on-roblox_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_003_off000046a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46A2 26476 bytes
SHA-256: f3aa577445fb6b16f76bd2b90484f4d8b7c89b05bdc86a6de0c8675ed3e81340
font_01_sfnt_off0000825c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x825C 18400 bytes
SHA-256: ff0928d05cd2328f5f6db263fee94a7b5023d77c4cae175890f1311eb4a8d902

Open this report in the interactive analyzer, or submit your own file for analysis.