Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d3387a2bead1de4…

MALICIOUS

PDF

35.7 KB Created: 2021-06-19 10:18:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bedea832aebebce79b914868e6817513 SHA-1: 2dd34c4412b4228fcf53e95e98523437dc78e95c SHA-256: 4d3387a2bead1de41e988dd23dfe2b9ba88323887311b0f494bba309b11c332e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which are related to game hacks and cheats for popular games like Coin Master and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a link farm or SEO manipulation tactic. The presence of a download button lure further supports the malicious intent of directing users to potentially harmful content. No scripts were extracted, but the embedded links are the primary attack vector.

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 http://netcdn.co/app/406889139/free-coin-master-cards-game-hack
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/how-to-hack-someone-on-roblox_GM431946152.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-apk-download_GM406889139.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/give-me-robux-now_GM431946152.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/free-cheat-codes-for-coin-master_GM406889139.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/legit-free-spins-coin-master_GM406889139.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/roblox-pink-free-robux_GM431946152.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/free-robux-real-working_GM431946152.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/earn-robux-by-watching-ads_GM431946152.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/coin-master-rewards-2021_GM406889139.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/coin-master-hack-generator_GM406889139.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/appsmob-info-coin-master-hack_GM406889139.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/who-to-get-free-robux_GM431946152.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/free-spins-coin-master-2021_GM406889139.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/roblox-hacks-2021_GM431946152.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/how-to-get-100-free-spins-on-coin-master_GM406889139.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/coin-master-free-spins-through-coin-pop_GM406889139.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-cheat_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000034d7.bin
d2220adc8b11c7d034fc63f2039909a09dee30b86f8c2c25cb2e319c0a252819		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34D7 23204 bytes
font_01_sfnt_off00006931.bin
2fc47c4066dd28e3547f22ef08ec611cc49326c2517731f27ce49f34897b6455		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6931 18172 bytes

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