Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0117b14c61a2198…

MALICIOUS

PDF

42.0 KB Created: 2021-05-16 22:34:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 096db736691a023275729b155c6f8db2 SHA-1: ca450c9300d4fb75d4ec9b859670d37623b48087 SHA-256: d0117b14c61a2198d716b7a6be3f3dd2bf53cf4df5db0947663f8854580b7950
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are presented as hacks or free items for games. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to drive traffic to potentially harmful content. The document body, though partially corrupted, contains references to game hacks and a URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-free-stuff-game-hack
    • https://razredna-nastava.net/files/coin-master-jackpot-madness-hack_GM406889139.pdf
    • https://razredna-nastava.net/files/coin-master-free-coins-no-human-verification_GM406889139.pdf
    • http://razredna-nastava.net/files/coin-master-free-spin-codes_GM406889139.pdf
    • https://razredna-nastava.net/files/free-robux-no-survey-or-human-verification_GM431946152.pdf
    • http://razredna-nastava.net/files/daily-coin-master-spins_GM406889139.pdf
    • https://razredna-nastava.net/files/coin-master-hack-ios-apk_GM406889139.pdf
    • http://razredna-nastava.net/files/minecraft-tower-defense-2-hacked_GM479516143.pdf
    • http://razredna-nastava.net/files/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdf
    • https://razredna-nastava.net/files/coin-master-hack-no-survey-or-verification_GM406889139.pdf
    • https://razredna-nastava.net/files/minecraft-cheats-switch_GM479516143.pdf
    • http://razredna-nastava.net/files/robux-hack-no-verification_GM431946152.pdf
    • https://razredna-nastava.net/files/roblox-hacked-accounts-list_GM431946152.pdf
    • http://razredna-nastava.net/files/unlimited-free-spins-coin-master_GM406889139.pdf
    • https://razredna-nastava.net/files/get-free-cards-in-coin-master_GM406889139.pdf
    • https://razredna-nastava.net/files/free-robux-hack-no-human-verification_GM431946152.pdf
    • http://razredna-nastava.net/files/free-roblox-card_GM431946152.pdf
    • https://razredna-nastava.net/files/roblox-no-download-hack_GM431946152.pdf
    • https://razredna-nastava.net/files/free-robux-mobile_GM431946152.pdf
    • https://razredna-nastava.net/files/coin-master-daily-spins-and-coins_GM406889139.pdf
    • http://razredna-nastava.net/files/can-you-get-robux-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004993.bin
6688bf2ad7f43d3d8579e008334093f3b2f1c8610945280a1bb9a715c600b3aa
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4993 25992 bytes
font_01_sfnt_off0000831f.bin
49970788d519349fbd5ba6badf06c324563f4794a9a5c1e41d0627a31815ac32
pdf-font-stream PDF embedded font (sfnt) at offset 0x831F 17848 bytes