Malicious PDF — malware analysis report

Static analysis result for SHA-256 851d07a66d1b87b7…

MALICIOUS

PDF

35.4 KB Created: 2021-06-26 22:38:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ee4f1625c81b5249e1fe8f3bdc578eaf SHA-1: 3af424167eea4e2e60a8ff9bb97ecea4775f6172 SHA-256: 851d07a66d1b87b75be7cf2bdd018509e3e5937e158468a30a25c318c048d23b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and a document body that promotes free in-game currency and game hacks, indicating a lure for potentially unwanted software or phishing. The heuristic PDF_SEO_LINK_FARM specifically identifies a mass of external links, many of which are SEO-optimized PDF links, suggesting a link farm designed to attract users searching for cheats or free items. The ML classifier also strongly flagged this PDF as malicious.

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/free-robux-no-scam-no-survey-no-human-verification-game-hack
    • http://www.himalassociation.org/himal/ck_image/files/free-roebucks-no-human-verification_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/best-free-minecraft-hacked-client_GM479516143.pdf
    • http://www.himalassociation.org/himal/ck_image/files/free-roblox-gear_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/pokemon-go-no-free-raid-pass_GM1094591345.pdf
    • http://www.himalassociation.org/himal/ck_image/files/collect-free-spin-linms-coin-master_GM406889139.pdf
    • http://www.himalassociation.org/himal/ck_image/files/roblox-free-robux-redeem-codes-2021_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/roblox-mod-menu-download-free_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-no-human-verification-or-survey_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/hack-voler-sur-roblox_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/earn-robux-com_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/robloxheroxyz-free-robux_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/easy-how-to-get-free-robux_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/minecraft-app-free-download_GM479516143.pdf
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/roblox-account-hacked-no-email-address_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/roblox-rape-hack_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-free-spins-and-free-coins_GM406889139.pdf
    • http://www.himalassociation.org/himal/ck_image/files/can-i-get-free-robux_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-giveaway-no-human-verification_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/how-to-hack-a-roblox-account-with-forgot-password_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000336d.bin
bee65b2860c7da4dc33a3db04a489b7ca0615e7766f5e1939447a58fdd8a195b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x336D 21808 bytes
font_01_sfnt_off00006392.bin
e9a4bdf6e3a4c09aa54fad6de7cfd5c0fbcc21eb8fd3b304592fa413d07f2701		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6392 19628 bytes

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