Malicious PDF — malware analysis report

Static analysis result for SHA-256 221cc82204e5b393…

MALICIOUS

PDF

44.8 KB Created: 2021-05-15 14:19:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 85a41efc9f9d48fcc225d2ea8daabbb4 SHA-1: d9b5e784743e98a877cf8e9deda754b20985ca0c SHA-256: 221cc82204e5b39342f0fd519883899134944f28ca4dde2055d3afc9f2a55f6a
62 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are related to game cheats and hacks, suggesting a lure to download malicious content. The presence of a 'download button' heuristic and the ML classifier's high confidence further support a malicious intent. The document body, though heavily obfuscated, contains references to 'Game Toolbox' and URLs that align with the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/479516143/game-toolbox-game-hack
    • http://uctovnictvosnv.sk/images/minecraft-logo-maker-free_GM479516143.pdf
    • http://uctovnictvosnv.sk/images/how-to-hack-minecraft_GM479516143.pdf
    • http://uctovnictvosnv.sk/images/can-you-actually-get-free-robux_GM431946152.pdf
    • http://uctovnictvosnv.sk/images/roblox-free-robux-codes_GM431946152.pdf
    • http://uctovnictvosnv.sk/images/roblox-free-robux-com_GM431946152.pdf
    • http://uctovnictvosnv.sk/images/wurst-client-download_GM479516143.pdf
    • http://uctovnictvosnv.sk/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • http://uctovnictvosnv.sk/images/no-scam-free-robux_GM431946152.pdf
    • http://uctovnictvosnv.sk/images/free-robux-no-verification-2021-ios_GM431946152.pdf
    • http://uctovnictvosnv.sk/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://uctovnictvosnv.sk/images/minecraft-free-download-android-apk-014-0_GM479516143.pdf
    • http://uctovnictvosnv.sk/images/oprewards-free-robux_GM431946152.pdf
    • http://uctovnictvosnv.sk/images/free-minecraft-severs_GM479516143.pdf
    • http://uctovnictvosnv.sk/images/free-robux-hack-us_GM431946152.pdf
    • http://uctovnictvosnv.sk/images/how-to-get-coin-master-free-spin-link_GM406889139.pdf
    • http://uctovnictvosnv.sk/images/free-roblox-hair-girl_GM431946152.pdf
    • http://uctovnictvosnv.sk/images/minecraft-realms-free-codes_GM479516143.pdf
    • http://uctovnictvosnv.sk/images/coin-master-free-spins-glitch_GM406889139.pdf
    • http://uctovnictvosnv.sk/images/earn-free-robux-for-roblox_GM431946152.pdf
    • http://uctovnictvosnv.sk/images/free-coins-and-spins-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a41.bin
389194f763b952fc5e40d2aa04720b946ac7f8c1b23ffacd61686fbd0d5abda4
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A41 25420 bytes
font_01_sfnt_off00008312.bin
02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8312 2912 bytes
font_02_sfnt_off00008d0e.bin
cc5ae47c5e11d0f88656729761c41b71782f27a7f5283d48097ca54d7cfe7015
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0E 18188 bytes