Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9d8079dd12823c8…

MALICIOUS

PDF

46.7 KB Created: 2021-05-12 09:39:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7d9758d84ef393555bc56c60f7d90b82 SHA-1: 0da7d56295ec064836fe723284261fa5bf392c9a SHA-256: d9d8079dd12823c88684b8a26e4b4255547eff61f9dcc5ff80ab3a46e906db04
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document exhibits characteristics of an advance-fee scam, using lures related to popular games like Minecraft and Roblox to entice users. It contains a high density of external links, many pointing to PDF files hosted on similar domains, suggesting a link farm designed to attract search engine traffic. The primary external URL, https://netcdn.xyz/app/479516143/how-to-get-minecraft-for-free-on-ipad-game-hack, is likely the intended destination for users seeking illicit game access, potentially leading to further malicious content or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/how-to-get-minecraft-for-free-on-ipad-game-hack
    • http://immo360grad.com/images/roblox-help-free-robux_GM431946152.pdf
    • http://immo360grad.com/images/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdf
    • http://immo360grad.com/images/coin-master-free-cards-link_GM406889139.pdf
    • http://immo360grad.com/images/free-robux-com-2021_GM431946152.pdf
    • http://immo360grad.com/images/free-coin-spin-daily-link-net_GM406889139.pdf
    • http://immo360grad.com/images/free-links-for-coin-master_GM406889139.pdf
    • http://immo360grad.com/images/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdf
    • http://immo360grad.com/images/mobihack-roblox-hack_GM431946152.pdf
    • http://immo360grad.com/images/coin-master-free-coins-2021_GM406889139.pdf
    • http://immo360grad.com/images/coin-master-hacks-that-actually-work_GM406889139.pdf
    • http://immo360grad.com/images/free-spins-on-coin-master_GM406889139.pdf
    • http://immo360grad.com/images/free-spin-links-coin-master-2021_GM406889139.pdf
    • http://immo360grad.com/images/free-roblox-clothes-codes_GM431946152.pdf
    • http://immo360grad.com/images/free-2021-robux_GM431946152.pdf
    • http://immo360grad.com/images/free-robux-codes-not-used_GM431946152.pdf
    • http://immo360grad.com/images/how-to-earn-free-spins-coin-master_GM406889139.pdf
    • http://immo360grad.com/images/free-rare-cards-for-coin-master-christmas_GM406889139.pdf
    • http://immo360grad.com/images/minecraft-pocket-edition-mods-for-free_GM479516143.pdf
    • http://immo360grad.com/images/coin-master-cheats-and-hacks_GM406889139.pdf
    • http://immo360grad.com/images/roblox-weird_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e76.bin
6ecfc8ed8ff5e8d0e60606c7efc3153537484593224d27f38241db6e4c831d96
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E76 26748 bytes
font_01_sfnt_off00008a1a.bin
801f6fa60decd1add2f223f91580103c35e150c924465f86a7a572b3e00674f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1A 3128 bytes
font_02_sfnt_off0000945a.bin
9e691df568453236f4d0ad162bd2f3ab3ed053816089b7695d089a9ceca8acc7
pdf-font-stream PDF embedded font (sfnt) at offset 0x945A 18224 bytes