Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b19aa202072b626…

MALICIOUS

PDF

46.4 KB Created: 2021-06-13 21:37:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6916652e2395baa3d4447cadce948add SHA-1: 784218d6aca75e65f43e948bb9ffb8103abb737d SHA-256: 7b19aa202072b62611805a97215c6c011d5f7a6bf629c7afe9bf7ff96b2aa3e9
142 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF links, suggesting a link farm. The document body and heuristics indicate a lure for free in-game items, likely leading to malicious sites or downloads. The presence of 'cmd_GM431946152.pdf' in the document text suggests an attempt to execute commands, potentially via embedded JavaScript or by exploiting PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.co/app/431946152/how-to-get-free-robux-game-link-game-hack
    • http://ff-klaffenbach.de/images/free-ways-to-get-free-robux-2021_GM431946152.pdf
    • http://ff-klaffenbach.de/images/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdf
    • http://ff-klaffenbach.de/images/coin-master-hack-apk-online_GM406889139.pdf
    • http://ff-klaffenbach.de/images/free-spins-coin-master-app_GM406889139.pdf
    • http://ff-klaffenbach.de/images/coin-master-official-page_GM406889139.pdf
    • http://ff-klaffenbach.de/images/coin-master-free-coins-and-spins-app_GM406889139.pdf
    • http://ff-klaffenbach.de/images/google-how-do-you-get-free-robux_GM431946152.pdf
    • http://ff-klaffenbach.de/images/game-coin-master-hack_GM406889139.pdf
    • http://ff-klaffenbach.de/images/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdf
    • http://ff-klaffenbach.de/images/free-accessories-roblox_GM431946152.pdf
    • http://ff-klaffenbach.de/images/coin-master-free-coins-app_GM406889139.pdf
    • http://ff-klaffenbach.de/images/robux-2021_GM431946152.pdf
    • http://ff-klaffenbach.de/images/how-to-get-robux-for-free-for-kids_GM431946152.pdf
    • http://ff-klaffenbach.de/images/roblox-studio-free-robux_GM431946152.pdf
    • http://ff-klaffenbach.de/images/free-fans-on-tiktok_GM835599320.pdf
    • http://ff-klaffenbach.de/images/coin-master-hack-no-survey_GM406889139.pdf
    • http://ff-klaffenbach.de/images/roblox-hax_GM431946152.pdf
    • http://ff-klaffenbach.de/images/how-to-hack-roblox-with-cmd_GM431946152.pdf
    • http://ff-klaffenbach.de/images/coin-master-hack-twitter_GM406889139.pdf
    • http://ff-klaffenbach.de/images/coin-master-free-spin-today_GM406889139.pdf
    • http://ff-klaffenbach.de/images/coin-mas
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000468b.bin
ef4ca306ee39b649671056f40677c8adcaba8e77c54434b3dffec9af6271ec57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x468B 24668 bytes
font_01_sfnt_off00007e99.bin
a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E99 7448 bytes
font_02_sfnt_off0000907b.bin
29f37e1d052f37cd0a504e78004feaa792f309484baa8c0c610f691e2ab44cf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x907B 19060 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.