Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a4ac10ad63a15b…

MALICIOUS

PDF

48.8 KB Created: 2021-05-12 13:08:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b201278b1d31a2ab054f2e1734dd9a65 SHA-1: c2dc8bc8eba203200910309e0963b37a33cbaee7 SHA-256: 13a4ac10ad63a15b7d087982388c35662dcf228d371900eaab086c646ced95ab
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are structured as SEO-optimized PDF gateways. These links point to pages offering game-related cheats and free currency, suggesting a lure for users to download potentially malicious content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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/431946152/roblox-images-game-hack
    • https://learnwmf.org/image/data/files/how-to-get-free-faces-on-roblox_GM431946152.pdf
    • https://learnwmf.org/image/data/files/roblox-gift-card-free-codes_GM431946152.pdf
    • https://learnwmf.org/image/data/files/minecraft-mod-menu_GM479516143.pdf
    • https://learnwmf.org/image/data/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • https://learnwmf.org/image/data/files/fast-robux-online_GM431946152.pdf
    • https://learnwmf.org/image/data/files/coin-master-free-spins-2021-generator_GM406889139.pdf
    • https://learnwmf.org/image/data/files/minecraft-servers-that-allow-hacks_GM479516143.pdf
    • https://learnwmf.org/image/data/files/free-minecraft-account-generator_GM479516143.pdf
    • https://learnwmf.org/image/data/files/free-unlimited-coins-for-coin-master_GM406889139.pdf
    • https://learnwmf.org/image/data/files/coin-master-hack-no-verification-ios_GM406889139.pdf
    • https://learnwmf.org/image/data/files/roblox-piano-hack_GM431946152.pdf
    • https://learnwmf.org/image/data/files/coin-master-attack-hack_GM406889139.pdf
    • https://learnwmf.org/image/data/files/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdf
    • https://learnwmf.org/image/data/files/best-minecraft-hacked-client-2021_GM479516143.pdf
    • https://learnwmf.org/image/data/files/tower-of-hell-roblox-hack_GM431946152.pdf
    • https://learnwmf.org/image/data/files/how-to-play-coin-master_GM406889139.pdf
    • https://learnwmf.org/image/data/files/uprobuxcom-free-robux_GM431946152.pdf
    • https://learnwmf.org/image/data/files/how-to-get-free-roblox-gift-cards_GM431946152.pdf
    • https://learnwmf.org/image/data/files/how-can-you-get-robux_GM431946152.pdf
    • https://learnwmf.org/image/data/files/download-coin-master-apk-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047e1.bin
c966f0eb02167077c2e019c13e08826c9f54fe9620f48ebb491c99a36e4182cc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47E1 26000 bytes
font_01_sfnt_off00008413.bin
bab8933fc39dc331bc4c1c904a82b1432ab2e02478fa0a59453c98c5c231da8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8413 2956 bytes
font_02_sfnt_off00008e2e.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E2E 5696 bytes
font_03_sfnt_off00009b40.bin
60fc3caab79bd3686efc44dc5524dac0a031abeba3a924753552739ae08f0db7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B40 18560 bytes

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