Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd87a8ccdb226a3…

MALICIOUS

PDF

44.9 KB Created: 2021-05-16 02:28:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5838581e75596534acc971037fa70abe SHA-1: ed2775c608b707be1d5dab209c18b1228d32585e SHA-256: fbd87a8ccdb226a31071ebe1f6d85f8638a6a17ef1c182c170444bacca66bba7
102 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are SEO-optimized and point to gaming-related topics like Minecraft and Roblox. The presence of a "download button" heuristic and the ML classifier's high confidence score indicate a malicious intent. The primary goal appears to be directing users to potentially malicious websites or download sites through these links.

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 https://netcdn.xyz/app/479516143/free-minecraft-bedrock-server-hosting-game-hack
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/coin-master-daily-free-coins-link_GM406889139.pdf
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/how-to-cheat-in-roblox_GM431946152.pdf
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/minecraft-xbox-one-code-free_GM479516143.pdf
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links-twitter_GM406889139.pdf
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/uprobuxcom-free-robux_GM431946152.pdf
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/free-robux-hack-no-verification_GM431946152.pdf
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/minecraft-pe-hacks-ios_GM479516143.pdf
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/coin-master-free-spins-coins_GM406889139.pdf
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/coin-master-fun-hack-online_GM406889139.pdf
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/coin-master-hack-coins_GM406889139.pdf
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/free-account-roblox-2021_GM431946152.pdf
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/free-ways-to-get-robux_GM431946152.pdf
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/microsoft-bing-free-robux_GM431946152.pdf
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/free-coins-coin-master-today_GM406889139.pdf
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/free-robux-wheel_GM431946152.pdf
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/free-robux-just-enter-username_GM431946152.pdf
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/free-2021-robux_GM431946152.pdf
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/is-there-a-way-to-get-free-robux_GM431946152.pdf
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/free-coins-for-coin-master_GM406889139.pdf
    • https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/roblox-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e65.bin
a55ddb4b7b5e80f2137b074ee4ba938c130a91b78dd34e8629632bd796828768		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E65 26940 bytes
font_01_sfnt_off00008c0e.bin
fcf161d812b4feaa3e2bf8e8c417d8656b3909a46e27a4c0a1d90eda073f6fc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0E 18672 bytes

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