Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c8c0c5f9ea7221…

MALICIOUS

PDF

34.2 KB Created: 2021-06-29 01:58:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ae0bd3ad659d986256daca639523a3b8 SHA-1: c7c60af62c6f5a57313d8f1cca322ed825fab7c0 SHA-256: 54c8c0c5f9ea7221a8c2826b9b5cd61e06c3fc8b6cfc369a6f3c0a8f036b9e84
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that promotes free game cheats and currency, indicating a lure for users to download potentially malicious content. The ML classifier and PDF link farm heuristics strongly suggest malicious intent. The primary attack pattern involves tricking users into clicking malicious links disguised as game-related downloads.

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-admin-roblox-2021-game-hack PDF link annotation
    • http://www.sourcology.com/uploaded_files/userfiles/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/roblox-prison-life-cheat-engine-hack_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/free-spins_GM406889139.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/numero-card-robux-50-free_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/coin-master-free-online_GM406889139.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/how-to-anti-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/pokemon-go-free-3-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/free-roblox-account-cookie-codes_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_off00002e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E53 21912 bytes
SHA-256: 7b40d6ad93ab888116d1c35293a81627180e8466fa4761230c36c8e9ceb7fe3e
font_01_sfnt_off00005ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED4 19608 bytes
SHA-256: 48ab17102479fe394d7036042897a581c4a4f0af40e2d31ce5d6f4ac5f66ba6f