Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc7653f7e5edaa89…

MALICIOUS

PDF

42.1 KB Created: 2021-05-13 22:36:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 24fab1407781ac80ccd264dc0842c635 SHA-1: 67b13e808cbb9aa9de0db37ea5549762b707ceb9 SHA-256: fc7653f7e5edaa89c9d42561bdc2f08f69153eee45cdee76395899c50046ffd1
102 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to pages offering free in-game currency or items for popular games like Coin Master and Roblox. The document body and embedded links suggest a lure to trick users into visiting malicious websites or downloading further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/free-spins-and-coins-from-coin-master-game-game-hack
    • http://www.travelone.ae/userfiles/files/free-robux-not-a-scam_GM431946152.pdf
    • http://www.travelone.ae/userfiles/files/robux-free-online_GM431946152.pdf
    • http://www.travelone.ae/userfiles/files/minecraft-java-for-free_GM479516143.pdf
    • http://www.travelone.ae/userfiles/files/coin-master-free-daily-rewards_GM406889139.pdf
    • http://www.travelone.ae/userfiles/files/coin-master-free-spins-reddit_GM406889139.pdf
    • http://www.travelone.ae/userfiles/files/coinmaster-spins_GM406889139.pdf
    • http://www.travelone.ae/userfiles/files/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdf
    • http://www.travelone.ae/userfiles/files/hacks-to-get-free-robux_GM431946152.pdf
    • http://www.travelone.ae/userfiles/files/actual-free-robux_GM431946152.pdf
    • http://www.travelone.ae/userfiles/files/free-promo-codes-for-coin-master_GM406889139.pdf
    • http://www.travelone.ae/userfiles/files/cmaster-club-coin-master-hack_GM406889139.pdf
    • http://www.travelone.ae/userfiles/files/coin-master-free-spins-ios-2021_GM406889139.pdf
    • http://www.travelone.ae/userfiles/files/minecraft-windows-10-mod-menu_GM479516143.pdf
    • http://www.travelone.ae/userfiles/files/free-robux-without-verification_GM431946152.pdf
    • http://www.travelone.ae/userfiles/files/daily-free-spins-for-coin-master_GM406889139.pdf
    • http://www.travelone.ae/userfiles/files/coin-master-hack-android-no-root_GM406889139.pdf
    • http://www.travelone.ae/userfiles/files/get-coin-master-free-spin_GM406889139.pdf
    • http://www.travelone.ae/userfiles/files/free-robux-no-verification-needed_GM431946152.pdf
    • http://www.travelone.ae/userfiles/files/play-roblox-for-free-on-google_GM431946152.pdf
    • http://www.travelone.ae/userfiles/files/roblox-girl-avatar_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000497e.bin
335a452361c0df26f25a3e4c43018c447b69427e9fb093f654ff7ae2413cd1dd
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x497E 24764 bytes
font_01_sfnt_off00008240.bin
2e070ee715f11ea8d65eda44c6fd279e135953ba38e8fe9d1b4d6fbcec9fcfce
pdf-font-stream PDF embedded font (sfnt) at offset 0x8240 18320 bytes