Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cbd1b824e28e807…

MALICIOUS

PDF

43.7 KB Created: 2021-06-04 05:02:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 92b850ebca98680b624c5ce0cc25157f SHA-1: 1472e25794a4cc3be063c85376934b9ff8441ae4 SHA-256: 9cbd1b824e28e80700c6271b2d512ff4b16f78d962b02d1337bb2670862f6f2c
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which are disguised as game hacks or free item generators, indicating a link farm or phishing attempt. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' specifically points to a lure for game hacks, and the presence of a download button lure further supports a malicious workflow. The primary URL, https://netcdn.online/app/431946152/roblox-sued-game-hack, is likely the initial destination for the user's interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/roblox-sued-game-hack PDF link annotation
    • http://digilib.iailm.ac.id//repository/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-snacks-link_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/views-for-tiktok-free_GM835599320.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-live_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-free-robux_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_off00005078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5078 24384 bytes
SHA-256: 621baaf6a76c9de7de64ccc357ec733f7cb8ac3d38845e2fd4a93e1ae5e28c9b
font_01_sfnt_off0000887b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x887B 18100 bytes
SHA-256: ceb05d308fc17805291ab9e53434ca96f69a4d98ec9d0cd75399c721fdce8c16

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