Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac37019187f57d9e…

MALICIOUS

PDF

48.9 KB Created: 2021-05-13 23:48:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 31331b60057bb60160a4c6ebe39a3c33 SHA-1: 4db614186f16b39c032990cfa89853d74bfe3959 SHA-256: ac37019187f57d9e5e2b7148fe6c3c3048e888728e685dd27fd5b1a06fa20657
102 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. The document body and extracted URLs indicate a lure related to game hacks and cheats, likely intended to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

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/mcpe-master-hack-unlimited-coins-latest-version-game-hack
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins-and-coins_GM406889139.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/coin-master-free-spins-links-2021_GM406889139.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/free-bling-bling-card-coin-master_GM406889139.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/free-coin-master-spins-for-today_GM406889139.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-builders-club_GM431946152.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/free-robux-com-2021_GM431946152.pdf
    • https://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/free-coins-for-coin-master_GM406889139.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/roblox-free-exploits_GM431946152.pdf
    • https://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/coin-master-time-hack-ios_GM406889139.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/lazy-blocks-com-free-robux_GM431946152.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/robux-generator_GM431946152.pdf
    • https://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-inspect_GM431946152.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/hack-coins-in-coin-master_GM406889139.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/free-robux-instantly_GM431946152.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/tiktok-minecraft-hacks_GM479516143.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-link_GM406889139.pdf
    • https://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/coin-master-online-free-spin_GM406889139.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/free-coins-and-spins-in-coin-master_GM406889139.pdf
    • https://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/free-games-like-minecraft_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d19.bin
e07047a5e58b8e0f2238cb53805baaea2a2de4445f605a7287cac93a77fdfc61		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D19 25656 bytes
font_01_sfnt_off00008710.bin
e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8710 8676 bytes
font_02_sfnt_off00009b9b.bin
9a564b0c0a644540a66c1b1ff06b652386e2dfb1d0e582b0e17ab2c442631031		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B9B 18720 bytes

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