Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6372652dff8f3f…

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 05:46:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bc4c9d34e7b5cfa4c9150faddf209bfc SHA-1: 30e261135f496a40229b3dcacd2b37204b4904c5 SHA-256: bd6372652dff8f3fdf9f77b20753f0841161d60e986c938e81e3587eafa7fe9a
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is designed as a lure, presenting itself as a guide to obtaining free in-game items or hacks. It contains numerous links, including a primary redirector URL, that point to websites offering such cheats. The ML classifier strongly indicates maliciousness, and the presence of external links suggests an attempt to drive traffic to potentially malicious sites or download further payloads.

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/406889139/how-to-get-free-cards-in-coin-master-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id//repository/coin-master-free-shield-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/pokemon-go-free-incubators_GM1094591345.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-aimbot_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/krnl-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-food-on-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
stream_004_off00004e23.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E23 25548 bytes
SHA-256: d8a1b65bfbfd489452507d64eee1b334ee78c1a0a99c28be02bdddf2a309384d
font_01_sfnt_off000088d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88D3 18048 bytes
SHA-256: 7ccb643ccaf69ae40f357d9fb3e4200e819aea0a880648815fab1dca28a77bc7

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