Malicious PDF — malware analysis report

Static analysis result for SHA-256 af58a230a71b4567…

MALICIOUS

PDF

46.5 KB Created: 2021-05-14 16:44:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 467fed2de260f3446551f7dcaa8e970e SHA-1: 7f49799be02337ea6e006222aac208c7d2414f01 SHA-256: af58a230a71b45676af4a876719e5912c16d0dd8e89e1b6ebb8425bb20ac0d53
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which are part of a link farm, suggesting a tactic to drive traffic to potentially malicious or scam-related websites. The document body and extracted URLs indicate a lure related to 'free robux' and game hacks, aligning with phishing or scamming activities. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/free-roblox-accounts-with-builders-club-game-hack
    • http://solidcommunication.ch/images/free-robux-no-gift-card_GM431946152.pdf
    • http://solidcommunication.ch/images/how-to-hack-coin-master-facebook_GM406889139.pdf
    • http://solidcommunication.ch/images/freespinandcoin-blogspot-com_GM406889139.pdf
    • http://solidcommunication.ch/images/how-to-get-robux-without-paying_GM431946152.pdf
    • http://solidcommunication.ch/images/coin-master-hack-without-verification-code-2021_GM406889139.pdf
    • http://solidcommunication.ch/images/coin-master-rewards_GM406889139.pdf
    • http://solidcommunication.ch/images/unlimited-free-spins-coin-master_GM406889139.pdf
    • http://solidcommunication.ch/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdf
    • http://solidcommunication.ch/images/mcpe-download_GM479516143.pdf
    • http://solidcommunication.ch/images/hack-coin-master-apk-2021_GM406889139.pdf
    • http://solidcommunication.ch/images/free-robux-images_GM431946152.pdf
    • http://solidcommunication.ch/images/how-to-make-roblox-clothes-for-free_GM431946152.pdf
    • http://solidcommunication.ch/images/free-robux-com-roblox_GM431946152.pdf
    • http://solidcommunication.ch/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdf
    • http://solidcommunication.ch/images/how-to-get-free-hair-in-roblox_GM431946152.pdf
    • http://solidcommunication.ch/images/coin-master-game-2021-free-spin-link_GM406889139.pdf
    • http://solidcommunication.ch/images/roblox-games-to-play-for-free_GM431946152.pdf
    • http://solidcommunication.ch/images/coin-master-free-food_GM406889139.pdf
    • http://solidcommunication.ch/images/how-to-get-free-robux-2021_GM431946152.pdf
    • http://solidcommunication.ch/images/free-robux-hack-no-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ab2.bin
0c6690a5ca72152ec69d334b6fc5c9db4e274f9a600a8db32c0e74928a56703f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB2 26328 bytes
font_01_sfnt_off000087d7.bin
02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87D7 2912 bytes
font_02_sfnt_off000091d4.bin
9ea8e82fd5ecc9ab188d724867cc57ca86b9540cef78e37352182fc5094430e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91D4 18848 bytes

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