Malicious PDF — malware analysis report

Static analysis result for SHA-256 d420e0ba8dc0b83c…

MALICIOUS

PDF

45.9 KB Created: 2021-06-13 19:57:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c5f4091129952656f15c100c56465471 SHA-1: 410bc2e3d062c882e9c2db9bb5c1977432ba4e2e SHA-256: d420e0ba8dc0b83c51b632ecb95e9f9d8a0bbc0bd2bac34845e04952512c171a
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links to other PDF files, many of which appear to be SEO-optimized lures for games and hacks. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful content. The primary URL http://netcdn.co/app/431946152/roblox-crashes-when-using-cheat-engine-game-hack is also suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/431946152/roblox-crashes-when-using-cheat-engine-game-hack
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-free-spins-reddit_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id//repository/robux-today_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-hack-apk-no-fb-login_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/4chan-roblox-hack_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/free-minecraft-account-and-password_GM479516143.pdf
    • https://katalog.smkn1glagah.sch.id/repository/how-to-hack-roblox-accounts-that-have-robux_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/get-me-robux-for-free_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/roblox-content-deleted-pants-free_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-free-coins-and-spins-group_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/free-robux-net_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/get-free-robux-today_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id//repository/free-minecraft-games-for-kids_GM479516143.pdf
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-free-spins-link-today-blogspot_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-hack-game-download-ios_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-cheat-apk-free-download_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/roblox-work-at-a-pizza-place-cheats-2021_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id//repository/google-how-do-you-get-robux_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/whats-a-code-for-roblox-to-get-free-robux_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id//repository/how-to-play-minecraft-for-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bce.bin
6e22cad550397598ad66e1cd0ae8f782007f40ab1ac38ff696f9e4db097a66bb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BCE 24708 bytes
font_01_sfnt_off000084d7.bin
94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84D7 2824 bytes
font_02_sfnt_off00008e85.bin
569329dbcb73376781a93dd85e69e39796b9095f9f1d1e000e4b0c1f7b4da108		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E85 19072 bytes

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