Malicious PDF — malware analysis report

Static analysis result for SHA-256 7390421bcf3273c7…

MALICIOUS

PDF

42.5 KB Created: 2021-05-16 18:32:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9a1456c5035f67b5a40efb5a3619dd62 SHA-1: 709f63cd8290b12929fc0737416ba0fe4e5c0442 SHA-256: 7390421bcf3273c71a025cb067f2e161bf022e1a69336ff1ae6bd9ad28bd4346
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and a document body that lures users with promises of free in-game currency and hacks for popular games like Roblox and Coin Master. The heuristic findings indicate a link farm designed to direct users to these malicious URLs, which are likely to host malware or phishing content. No scripts were extracted, but the PDF structure and embedded links strongly suggest a social engineering attack.

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/431946152/cute-free-hair-on-roblox-game-hack
    • http://smart-pro.co.uk/images/free-coin-master-coins-and-spins_GM406889139.pdf
    • http://smart-pro.co.uk/images/how-to-get-more-robux-for-free_GM431946152.pdf
    • http://smart-pro.co.uk/images/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://smart-pro.co.uk/images/easy-how-to-get-free-robux_GM431946152.pdf
    • http://smart-pro.co.uk/images/tower-of-hell-roblox-hack_GM431946152.pdf
    • http://smart-pro.co.uk/images/free-robux-app-2021_GM431946152.pdf
    • http://smart-pro.co.uk/images/roblox-free-robux-generator_GM431946152.pdf
    • http://smart-pro.co.uk/images/spin-hack-for-coin-master_GM406889139.pdf
    • http://smart-pro.co.uk/images/free-robux-hack-no-verification_GM431946152.pdf
    • http://smart-pro.co.uk/images/coin-master-free-spin-codes_GM406889139.pdf
    • http://smart-pro.co.uk/images/free-spins-and-coins-for-coin-master_GM406889139.pdf
    • http://smart-pro.co.uk/images/how-to-hack-to-get-robux_GM431946152.pdf
    • http://smart-pro.co.uk/images/free-robux-cards_GM431946152.pdf
    • http://smart-pro.co.uk/images/free-fire-coin-master_GM406889139.pdf
    • http://smart-pro.co.uk/images/free-roblox-groups-with-funds_GM431946152.pdf
    • http://smart-pro.co.uk/images/minecraft-pocket-edition-apk-free-download_GM479516143.pdf
    • http://smart-pro.co.uk/images/free-spins-coin-master-links_GM406889139.pdf
    • http://smart-pro.co.uk/images/minecraft-aimbot_GM479516143.pdf
    • http://smart-pro.co.uk/images/robloxmatchcom-free-robux_GM431946152.pdf
    • http://smart-pro.co.uk/images/robux-claimer_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048fe.bin
616c56ab6d98ef34770108ce73b3e92069699e558450a108178660716e127820		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48FE 25068 bytes
font_01_sfnt_off00008307.bin
488c37b81cb6318595a8d643f53454b31d34364b68f61b3c1daecc568804ddf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8307 18540 bytes

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