Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f18edf55cd86f06…

MALICIOUS

PDF

43.8 KB Created: 2021-05-15 22:54:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f7de3546c6522e61f9d71a9e3fd07b3a SHA-1: bdaa8a67ec511859a8fe0d4e74fecad01492ebd5 SHA-256: 1f18edf55cd86f06887581e4711cb28844e8de12bf0133d3518530b198e8fb63
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which appear to be part of an SEO link farm. The document body and extracted URLs suggest a lure related to "Coin Master" or "Roblox" hacks, likely intended to drive traffic to these external sites. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points towards a malicious workflow, possibly for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • 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.
  • 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-hack-2021-without-verification-game-hack
    • https://www.hotel-forsthaus.com/images/how-to-hack-roblox-for-robux_GM431946152.pdf
    • https://www.hotel-forsthaus.com/images/coin-master-spin-hack_GM406889139.pdf
    • https://www.hotel-forsthaus.com/images/http-appsmob-info-coin-master-hack_GM406889139.pdf
    • https://www.hotel-forsthaus.com/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdf
    • https://www.hotel-forsthaus.com/images/coin-master-hack-without-verification-ios_GM406889139.pdf
    • https://www.hotel-forsthaus.com/images/coin-master-free-spins-link-deutsch-ios_GM406889139.pdf
    • https://www.hotel-forsthaus.com/images/get-free-robux-now_GM431946152.pdf
    • https://www.hotel-forsthaus.com/images/coin-master-100-spin_GM406889139.pdf
    • https://www.hotel-forsthaus.com/images/coin-master-hack-uk_GM406889139.pdf
    • https://www.hotel-forsthaus.com/images/how-to-get-coin-master-free-spins-in-email_GM406889139.pdf
    • https://www.hotel-forsthaus.com/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • https://www.hotel-forsthaus.com/images/coin-master-free-spins-link-2021-ios_GM406889139.pdf
    • https://www.hotel-forsthaus.com/images/free-spins-coin-master-legit_GM406889139.pdf
    • https://www.hotel-forsthaus.com/images/coin-master-hack-mod-apk-download_GM406889139.pdf
    • https://www.hotel-forsthaus.com/images/minecraft-for-chromebook-free_GM479516143.pdf
    • https://www.hotel-forsthaus.com/images/coin-master-hack-progamers_GM406889139.pdf
    • https://www.hotel-forsthaus.com/images/make-robux_GM431946152.pdf
    • https://www.hotel-forsthaus.com/images/how-to-make-a-minecraft-server-for-free_GM479516143.pdf
    • https://www.hotel-forsthaus.com/images/free-coins-on-coin-master-without-verification_GM406889139.pdf
    • https://www.hotel-forsthaus.com/images/how-to-get-free-clothes-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e45.bin
67bebb50fb3d05c5fb66e73c716794a39f36954150ffe1521dee1cb7c4dde7aa
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E45 24856 bytes
font_01_sfnt_off00008798.bin
8aa4e312459bb9d5d616f22e45372e364c039c39adebed3f09684cd63dbfffd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8798 18756 bytes