Malicious PDF — malware analysis report

Static analysis result for SHA-256 d343e891e1cb515b…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 01:48:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 45f4d048265cd7d4d819a8f509717da5 SHA-1: ddbc4c25eea66cdf1c0dc7d967306162900b31ac SHA-256: d343e891e1cb515b8c4200d7b375418a396cb572c90612d853ccea7c10f263be
102 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which are SEO-optimized and point to game-related hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to drive traffic to potentially harmful content. The document body and extracted URLs indicate a lure for game-related exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spin-daily-link-game-hack
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/minecraft-hack-2021_GM479516143.pdf
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/unlimited-spin-coin-master-hack_GM406889139.pdf
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/roblox-blox-no-hero-academia-script-hack_GM431946152.pdf
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/coin-master-get-free-cards_GM406889139.pdf
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/free-unlimited-coin-master-online-tool_GM406889139.pdf
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdf
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/coin-master-free-link-spin_GM406889139.pdf
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/spin-link_GM406889139.pdf
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/hack-para-roblox-dragon-ball-rage-2021_GM431946152.pdf
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/how-to-install-free-song-to-roblox_GM431946152.pdf
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/bux-land-free-robux_GM431946152.pdf
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/hack-roblox-sans-verification-humaine_GM431946152.pdf
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021_GM406889139.pdf
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/noob-pro-hacker-roblox_GM431946152.pdf
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/want-free-robux-copy-and-paste_GM431946152.pdf
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/robux-free-c_GM431946152.pdf
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/get-2021-free-spins-on-coin-master_GM406889139.pdf
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/free-spins-coins-coin-master_GM406889139.pdf
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/free-roblox-catalogs_GM431946152.pdf
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/free-robux-without-downloading-anything_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000325d.bin
c5ad3ba6d23043e66e9abd17e37d10ed7951ab032b0a58a8b9b54b854f723932		 pdf-font-stream PDF embedded font (sfnt) at offset 0x325D 22812 bytes
font_01_sfnt_off00006573.bin
9fefbb771085525faa6b6b1c9c948570a810338fb9e41354c9418806dfb9931a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6573 18768 bytes

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