Malicious PDF — malware analysis report

Static analysis result for SHA-256 76d70e077cd2aada…

MALICIOUS

PDF

46.2 KB Created: 2021-06-11 12:37:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f3381c9d674da15f09a3cad0716a53cd SHA-1: 38c1fb357152244946daccffb02d99a888a786bf SHA-256: 76d70e077cd2aadaae1c7d20305f56e87dbdd5832969c22ea7eb6d92c941012f
102 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are presented as download opportunities for in-game currency or cheats. The document's structure and content, including the presence of a "download button" heuristic, strongly suggest a phishing or scam attempt designed to trick users into visiting malicious URLs. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.tw/app/431946152/how-to-hack-roblox-robux-with-cheat-engine-6.4-game-hack
    • https://www.belgium-archery.be/images/free-promo-codes-for-robux_GM431946152.pdf
    • https://www.belgium-archery.be/images/free-robux-no-gift-card_GM431946152.pdf
    • https://www.belgium-archery.be/images/is-there-a-free-trial-for-roblox-bc_GM431946152.pdf
    • https://www.belgium-archery.be/images/free-tiktok-followers_GM835599320.pdf
    • https://www.belgium-archery.be/images/coin-master-free-spins-and-coins-app-download_GM406889139.pdf
    • https://www.belgium-archery.be/images/cm-free-spins_GM406889139.pdf
    • https://www.belgium-archery.be/images/coin-master-free-coins-cheat_GM406889139.pdf
    • https://www.belgium-archery.be/images/free-robux-no-wait-2021_GM431946152.pdf
    • https://www.belgium-archery.be/images/free-robux-scams_GM431946152.pdf
    • https://www.belgium-archery.be/images/master-8-ball-pool-free-coins_GM406889139.pdf
    • https://www.belgium-archery.be/images/coin-master-hack-to-get-free-spins_GM406889139.pdf
    • https://www.belgium-archery.be/images/what-do-roblox-points-do_GM431946152.pdf
    • https://www.belgium-archery.be/images/try-coin-master-hack_GM406889139.pdf
    • https://www.belgium-archery.be/images/free-modded-minecraft-server-hosting_GM479516143.pdf
    • https://www.belgium-archery.be/images/free-robux-website-bloxburg-sign_GM431946152.pdf
    • https://www.belgium-archery.be/images/roblox-source_GM431946152.pdf
    • https://www.belgium-archery.be/images/how-to-get-minecraft-windows-10-for-free_GM479516143.pdf
    • https://www.belgium-archery.be/images/free-coin-and-spin-in-coin-master_GM406889139.pdf
    • https://www.belgium-archery.be/images/coin-master-free-gifts_GM406889139.pdf
    • https://www.belgium-archery.be/images/cheat-codes-for-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000514d.bin
779a76c56fb8d80ec238309ad03013b90afb5e950ddf0ab9e7f4c311e955b9ed
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x514D 26380 bytes
font_01_sfnt_off00008e06.bin
8c7917cb081f5807acb21271782c8e51ca1379a47208d4323b5c696a23f98fac
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E06 19660 bytes