Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd8e9c846ad3173…

MALICIOUS

PDF

35.9 KB Created: 2021-07-09 20:32:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2eb07ec892ffa52b2344aacd37ceaec2 SHA-1: a43baebb4f77574a697099282ef56327c93eff7b SHA-256: 8fd8e9c846ad31730c5d2a2126e5ca1ee7846ca561f38db3f58e50513cc1739d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a call-to-action phrase, strongly suggesting a phishing or scam attempt. The document body and extracted URLs point towards lures for free in-game currency or hacks, likely directing users to malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

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/431946152/how-to-get-free-robux-on-pc-game-hack
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-android-apk_GM406889139.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/mobihack-net-roblox-hack_GM431946152.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/cool-kid-roblox-hacks_GM431946152.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/is-minecraft-java-edition-free_GM479516143.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/minecraft-free-download-apk-softonic_GM479516143.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/get-free-robux_GM431946152.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-using-apps_GM431946152.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/coin-master-2021-free-spins-link-blogspot_GM406889139.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/coin-master-hacking-news_GM406889139.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/free-tiktok-accounts_GM835599320.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/cloudbux-net-roblox-hack_GM431946152.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/free-robux-no-verification-needed_GM431946152.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/hack-coin-master-without-verification_GM406889139.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/no-human-verification-coin-master-hack_GM406889139.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/free-robux-2021-no-human-verification_GM431946152.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/is-minecraft-education-edition-free_GM479516143.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/2021-free-coin-master-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000351b.bin
a59ecf1f25c16b7fc597986ac1856c4aa4ecbfd1db62f2c76fd9d5a224f23799		 pdf-font-stream PDF embedded font (sfnt) at offset 0x351B 22516 bytes
font_01_sfnt_off00006729.bin
aef8c40112b84489b97b1b1a2bbf6c88e9b8fe4bc85a356f803a45374dab5087		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6729 19136 bytes

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