Malicious PDF — malware analysis report

Static analysis result for SHA-256 963837923def55ff…

MALICIOUS

PDF

43.8 KB Created: 2021-05-11 23:36:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cf7a042140d386f2d0ebfa6e9ef0b03f SHA-1: 30a84348e5ac948c9656c301fb6fc6264f0e20df SHA-256: 963837923def55fff70df315e629e184b755af95ae7302105d5d94790dd57cf0
142 Risk Score

Malware Insights

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

This PDF document functions as a link farm, employing a 'game hack' lure to redirect users to external websites. The document contains numerous links to other PDF files hosted on similar domains, all promoting game hacks and cheats. This indicates a coordinated effort to drive traffic to potentially malicious or scam-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/406889139/coin-master-free-2021-spin-link-today-game-hack PDF link annotation
    • http://greasley.website/images/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://greasley.website/images/coin-master-links-that-don-t-expire_GM406889139.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ABA 26100 bytes
SHA-256: 06db26d7a85877d52f17ab884b5b8e33a40f9f4802a70ce616e15d6a1723ce4d
font_01_sfnt_off0000872b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x872B 18812 bytes
SHA-256: 7f624a4da072bd42e21ae13ab081f80009d2c012a41e181bc6a40f65c236f9bb

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