Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8fe10e03e5225c0…

MALICIOUS

PDF

41.4 KB Created: 2021-05-19 03:51:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d0bfc4a6e84199350125ba5979fef2f8 SHA-1: 82514ac880e2b3f253a9219fdafea97ec8826d60 SHA-256: b8fe10e03e5225c06e63c66bc9086f60da1de14543b9e62100bcb967d28a0b84
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document employs social engineering tactics, presenting itself as a lure for game hacks and resources, and explicitly instructs the user to install a browser extension or update. The document contains numerous embedded URLs, including one pointing to 'tiktok-free-mockup-game-hack', and a large number of links to other PDF files, suggesting a link farm designed to drive traffic or distribute further payloads. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/835599320/tiktok-free-mockup-game-hack
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/coin-master-20-free-spins-link-2021_GM406889139.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/roblox-hacks-com_GM431946152.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-free-download_GM406889139.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/what-is-a-minecraft-client_GM479516143.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/free-robux-without-human-verification-2021_GM431946152.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/how-do-you-get-free-coins-in-coin-master_GM406889139.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/hacks-to-get-free-robux_GM431946152.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/minecraft-the-complete-handbook-collection_GM479516143.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/free-roblox-hack-us_GM431946152.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/get-free-spins-for-coin-master_GM406889139.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-2021_GM406889139.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/free-coin-master-hacks-no-verification_GM406889139.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/free-spin-coin-master-apk_GM406889139.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/wizard-hacks_GM479516143.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/minecraft-xray-hack_GM479516143.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/free-minecraft-skin-packs_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004824.bin
19da2a3959080b64ef3c0722873e4ad69cbd6ef11b25b3d6823b52e6d858c6fd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4824 24472 bytes
font_01_sfnt_off00008099.bin
d4d7c3302446f1f3b0cf250b8463c4f3de38df319758d5687ab410fe9b4b07fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8099 17968 bytes

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