Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e99095c452c760b…

MALICIOUS

PDF

41.5 KB Created: 2021-05-16 04:00:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8db520f7de7ebbd307b90b89873672fb SHA-1: e424a35c4c6bde1f39db363cf766c3518345285a SHA-256: 5e99095c452c760b6e90a0eade625200401192fbce9b96e18cbfbecff0f5d48e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, identified as a PDF link farm, suggesting a tactic to manipulate search engine results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links indicate an attempt to redirect users to potentially harmful content, such as the URL https://netcdn.xyz/app/406889139/master-hack-coin-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/master-hack-coin-game-hack
    • http://hondenspecialist-engelien.nl/images/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://hondenspecialist-engelien.nl/images/what-is-robux_GM431946152.pdf
    • http://hondenspecialist-engelien.nl/images/how-many-villages-are-in-coin-master_GM406889139.pdf
    • http://hondenspecialist-engelien.nl/images/mcpe-master-unlimited-coins-free-download_GM406889139.pdf
    • http://hondenspecialist-engelien.nl/images/coin-master-free-gifts_GM406889139.pdf
    • http://hondenspecialist-engelien.nl/images/free-robux-accounts_GM431946152.pdf
    • http://hondenspecialist-engelien.nl/images/get-free-robux-without-doing-anything_GM431946152.pdf
    • http://hondenspecialist-engelien.nl/images/coin-master-time-hack-ios_GM406889139.pdf
    • http://hondenspecialist-engelien.nl/images/blox-world-free-robux_GM431946152.pdf
    • http://hondenspecialist-engelien.nl/images/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdf
    • http://hondenspecialist-engelien.nl/images/coin-master-free-100-spin-link_GM406889139.pdf
    • http://hondenspecialist-engelien.nl/images/coin-master-hack-2021-android_GM406889139.pdf
    • http://hondenspecialist-engelien.nl/images/how-do-u-hack-roblox_GM431946152.pdf
    • http://hondenspecialist-engelien.nl/images/free-robux-redeem-codes-2021_GM431946152.pdf
    • http://hondenspecialist-engelien.nl/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdf
    • http://hondenspecialist-engelien.nl/images/can-i-get-free-robux_GM431946152.pdf
    • http://hondenspecialist-engelien.nl/images/coin-master-fan-page-free-spins_GM406889139.pdf
    • http://hondenspecialist-engelien.nl/images/daily-free-spins-coin-master-2021_GM406889139.pdf
    • http://hondenspecialist-engelien.nl/images/get-free-spins-for-coin-master_GM406889139.pdf
    • http://hondenspecialist-engelien.nl/images/free-roblox-promo-codes-for-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a17.bin
e40ec0551722aa5e61d0418dd5c608c877e745096659f8022b9dbaf083354406
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A17 24764 bytes
font_01_sfnt_off0000819e.bin
458e034195b9d21dc4a16e006206fa5889a20d0bfe7da041b4dcadf36e5a6633
pdf-font-stream PDF embedded font (sfnt) at offset 0x819E 17716 bytes