Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd692f16168ceae…

MALICIOUS

PDF

35.1 KB Created: 2021-07-09 08:37:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cd0c65d6a56762c1c9ccf135c28689e9 SHA-1: 5af50f11c5720c3f3a303ba40f43f4e0b8b1e2d9 SHA-256: 2cd692f16168ceae5fa462f73023e21e88b22082cff7ff2aef5430dc6ac904b4
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs that form a link farm, primarily directing users to pages offering hacks or free in-game currency for popular games. The document body and heuristics indicate a lure for users seeking cheats, likely leading to malware downloads or further phishing attempts. The ML classifier strongly supports the malicious nature of this PDF.

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.tw/app/406889139/coin-master-hack-without-verification-2021-game-hack
    • https://lamgiangservice.com/ckfinder/userfiles/files/how-to-get-free-robux-no-hack-or-inspect_GM431946152.pdf
    • https://lamgiangservice.com/ckfinder/userfiles/files/pubg-uc-and-bp-free_GM1330123889.pdf
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-robux-now_GM431946152.pdf
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-robux-net_GM431946152.pdf
    • https://lamgiangservice.com/ckfinder/userfiles/files/daily-free-spins-coin-master-app_GM406889139.pdf
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-robux-only-username-no-human-verification_GM431946152.pdf
    • https://lamgiangservice.com/ckfinder/userfiles/files/coin-master-free-spins-link-download-apk_GM406889139.pdf
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-robux-codes-generator-no-verification_GM431946152.pdf
    • https://lamgiangservice.com/ckfinder/userfiles/files/radio-cheat-roblox_GM431946152.pdf
    • https://lamgiangservice.com/ckfinder/userfiles/files/what-is-a-robux_GM431946152.pdf
    • https://lamgiangservice.com/ckfinder/userfiles/files/10-robux_GM431946152.pdf
    • https://lamgiangservice.com/ckfinder/userfiles/files/robux-free-c_GM431946152.pdf
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-minecraft-survival-server_GM479516143.pdf
    • https://lamgiangservice.com/ckfinder/userfiles/files/walking-through-hack-roblox-v8_GM431946152.pdf
    • https://lamgiangservice.com/ckfinder/userfiles/files/how-to-sell-free-shirts-on-roblox_GM431946152.pdf
    • https://lamgiangservice.com/ckfinder/userfiles/files/how-to-hack-the-creator-roblox_GM431946152.pdf
    • https://lamgiangservice.com/ckfinder/userfiles/files/how-to-get-free-robux-without-getting-scammed_GM431946152.pdf
    • https://lamgiangservice.com/ckfinder/userfiles/files/coin-master-website_GM406889139.pdf
    • https://lamgiangservice.com/ckfinder/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • https://lamgiangservice.com/ckfinder/userfiles/files/coin-master-hack-no-human-verification_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003132.bin
ea246bded6b2ab24214a358ca98d9d2fbcb1f6fe86d1ed9e9c5e202c1a6bd24a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3132 22824 bytes
font_01_sfnt_off00006450.bin
bc164ad6cfe60f57cf308bf587fcf39d6d442c5b14af35d4986789bcc521b71c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6450 19044 bytes

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