Malicious PDF — malware analysis report

Static analysis result for SHA-256 b979ac62cbbeda8d…

MALICIOUS

PDF

33.5 KB Created: 2021-06-30 01:36:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8195a8272acf7aca1f7831de765aa700 SHA-1: f934d0eda6c57e0d945f49343b94a4eb46a9e8d0 SHA-256: b979ac62cbbeda8d0a70a1b5955ad8278cdb248942deff97a9c33dd512e21ff7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many of which are structured as downloadable PDF files promising game hacks and cheats. The ML classifier and PDF link farm heuristics strongly indicate malicious intent, likely to distribute malware disguised as game-related content. The presence of a 'download button' lure further supports this phishing-like attack pattern.

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.co/app/431946152/how-to-get-free-robux-flamingo-game-hack PDF link annotation
    • http://apotema.com.co/ufiles/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/coin-master-pet-food-hack_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/como-descargar-roblox-hackeado-para-android-2021_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/how-to-hack-roblox-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/hack-version-of-the-game-apk-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/how-to-get-free-robux-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-robux-generator-android_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/roblox-commands-hack-2021_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-robux-generator-no-human-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/roblox-pokemon-go-cheats_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C7E 21908 bytes
SHA-256: d49afee5225073be26b1c2c24d70cd73fa6d6285c77aa8ddc82aa89e4ee68543
font_01_sfnt_off00005cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD6 19436 bytes
SHA-256: 708faa4bc7b6187acd82df77b2c9d38dea7dee537d8905a49c5cb51a32e1bccf

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