Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc55d0810bb834a…

MALICIOUS

PDF

47.2 KB Created: 2021-06-09 05:07:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4da9c88712691c6a98aaa71d0ad54ec4 SHA-1: ef4e283e7e1ccef21022fbeb6bf1f2e70e2e3b7b SHA-256: 0fc55d0810bb834ab28f653015384ea2aca3761a8cde071b6b8de7c85533ab4a
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for 'Free 800 Robux Code' and links to external sites promising game hacks. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of numerous URLs pointing to similar content indicate a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.tw/app/431946152/free-800-robux-code-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-do-you-lv-up-in-hacking-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000512e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x512E 24844 bytes
SHA-256: 4913455ffb8d660d25342212de189e0c39e0db670511c78a5ca947c40c6aba21
font_01_sfnt_off00008acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACD 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000094b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94B8 18572 bytes
SHA-256: 0e1853968af72f71d3b269e8a0846cf2477c07da9fc758be17bef23efd8365c9

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