Malicious PDF — malware analysis report

Static analysis result for SHA-256 307afd33d3ff37fe…

MALICIOUS

PDF

42.4 KB Created: 2021-05-14 23:18:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 379566f9ae0ee3788031cb41eb4b2231 SHA-1: 5bdedc0aaf1ece9eeb7d95cf694793cebbe51126 SHA-256: 307afd33d3ff37fe16706912f492f84378851e45bcd41bc0879ee817b34e4618
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which are SEO-optimized and point to other PDF files. The primary URL, 'https://netcdn.xyz/app/406889139/coin-master-50-spin-link-game-hack', suggests a lure related to game cheats or hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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/coin-master-50-spin-link-game-hack PDF link annotation
    • http://dream-house.de/images/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://dream-house.de/images/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://dream-house.de/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://dream-house.de/images/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • http://dream-house.de/images/coin-master-map_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://dream-house.de/images/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://dream-house.de/images/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://dream-house.de/images/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://dream-house.de/images/minecraft-java-edition-free_GM479516143.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_003_off00004a35.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A35 25256 bytes
SHA-256: 400e6e5b1e7ce549ae035fcd36b53ad023e740124209bebb692a8507ffe430a9
font_01_sfnt_off0000837e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x837E 18196 bytes
SHA-256: 1133898f442132de6b3babc63911783103e8ae6e1bd19e5d3637905fb0848ccb

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