Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22a10a2c92c5b9f…

MALICIOUS

PDF

42.1 KB Created: 2021-05-18 00:16:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0033db1790b500a81f1bf1e7cf206ec1 SHA-1: 6e443058d5eb1131d5ab1d89cae98a394092b465 SHA-256: e22a10a2c92c5b9fdb09fa8e82c650c7a35190d188de6908fbe8817e6b068397
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are SEO-optimized and point to websites offering game hacks and free spins. This suggests a link farm or a phishing attempt designed to lure users to malicious sites. The ML classifier also strongly indicated maliciousness.

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/how-to-get-daily-free-spins-on-coin-master-game-hack
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-root_GM406889139.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/coin-master-claim-free-spins_GM406889139.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/robux-free-c_GM431946152.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-spins-and-coins-for-coin-master_GM406889139.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/minecraft-pe-hacked-client-download_GM479516143.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/hack-coin-master-game-apk-download_GM406889139.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-roblox-svg_GM431946152.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/roblox-bux-free_GM431946152.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-android-1_GM406889139.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/hacks-for-roblox-prison-life_GM431946152.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/coin-master-free-rewards-link_GM406889139.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-robux-come_GM431946152.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-spins-coin-master-hack-2021_GM406889139.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/roblox-catalog-free_GM431946152.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-robux-com_GM431946152.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/get-free-spins-coin-master_GM406889139.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-minecraft-premium-account_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a21.bin
a79a6a11a6194d5c9cec7de8e3772d48a4c16544b9db85e8645512855b6dbc84		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A21 24408 bytes
font_01_sfnt_off0000819d.bin
39c175e238be4f7921b046c78c06fe9a00b09eca58e402890515fe03c626abe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x819D 18472 bytes

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