Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e9fa04bcddf7598…

MALICIOUS

PDF

48.1 KB Created: 2021-05-13 08:04:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bdf0213342d7a4a596d423654d0731b1 SHA-1: ef240cfeee3e7f13fcef8409480ceae2aafa8b19 SHA-256: 2e9fa04bcddf759855f8658f9a51a1904612f76ddf9dea9273f77fc6c3486749
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which are structured as SEO-optimized URLs pointing to game-related cheats and hacks. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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-free-clothes-hack-game-hack
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdf
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/how-can-you-get-free-robux_GM431946152.pdf
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/how-do-u-get-free-robux-2021_GM431946152.pdf
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/free-minecraft-for-kids_GM479516143.pdf
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/coin-master-free-cards-2021_GM406889139.pdf
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/coin-master-hack-mod_GM406889139.pdf
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/coin-master-20-free-spins-link-today_GM406889139.pdf
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/roblox-hack-download_GM431946152.pdf
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/roblox-fun-com-free-robux_GM431946152.pdf
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/minecraft-free-play-no-download_GM479516143.pdf
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/archery-master-3d-coins-hack_GM406889139.pdf
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/coin-master-free-spin-link-today-50_GM406889139.pdf
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/coin-master-free-spins-link-june-2021_GM406889139.pdf
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/free-spins-on-coin-master-2021_GM406889139.pdf
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/oprewards-free-robux_GM431946152.pdf
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/coin-master-free-spain_GM406889139.pdf
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/can-you-get-robux-for-free_GM431946152.pdf
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/how-to-hack-someone-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d7a.bin
f15361405d8dd841446fb179eb1f1d76b0346686a6aff5ecc2210ea2a95a1a12		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D7A 26800 bytes
font_01_sfnt_off00008c82.bin
8e24205afdd13dcdea98f8150ef77dee4030e0e50a7c748783d1b4598e034a20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C82 3464 bytes
font_02_sfnt_off000098b8.bin
103feac3cc5aa8b61edffdeede0b2c422429be550018f77d71a4c0e7d6940ea7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98B8 18616 bytes

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