Malicious PDF — malware analysis report

Static analysis result for SHA-256 8820011366f8d0af…

MALICIOUS

PDF

44.6 KB Created: 2021-05-17 18:11:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fc96d8dcc5e883a2d4212a749bb2c72a SHA-1: 74c9972a5013f602955cc2f9367164c450e67e72 SHA-256: 8820011366f8d0afa73a0eb198928a013d5c2f350d14ec08849f10fd0199bdbc
102 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which are SEO-optimized and point to pages offering game hacks and cheats. The ML classifier also flagged this PDF as malicious. The presence of a "download button" heuristic further suggests a user-driven download attempt. The primary goal appears to be directing users to external sites that may host malware or engage in scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/coin-master-hack-spins-free-game-hack
    • http://j-cook.pro/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://j-cook.pro/images/free-minecraft-server-maker_GM479516143.pdf
    • http://j-cook.pro/images/free-role-in-coin-master_GM406889139.pdf
    • http://j-cook.pro/images/coin-master-hack-unlimited-spins-apk_GM406889139.pdf
    • http://j-cook.pro/images/coin-master-hack-version-download-2021_GM406889139.pdf
    • http://j-cook.pro/images/free-robux-generator-for-kids_GM431946152.pdf
    • http://j-cook.pro/images/android-coin-master-3433-apk-hack_GM406889139.pdf
    • http://j-cook.pro/images/roblox-free-items-glitch_GM431946152.pdf
    • http://j-cook.pro/images/hack-coin-master-8-ball-pool_GM406889139.pdf
    • http://j-cook.pro/images/free-robux-no-verification-no-download_GM431946152.pdf
    • http://j-cook.pro/images/free-robux-games-on-roblox_GM431946152.pdf
    • http://j-cook.pro/images/coin-master-free-spins-facebook_GM406889139.pdf
    • http://j-cook.pro/images/coin-master-hack-ios-without-verification_GM406889139.pdf
    • http://j-cook.pro/images/free-modded-minecraft-server-hosting_GM479516143.pdf
    • http://j-cook.pro/images/coin-master-free-spins-link-hack_GM406889139.pdf
    • http://j-cook.pro/images/free-spins-on-coin-master-2021_GM406889139.pdf
    • http://j-cook.pro/images/body-roblox_GM431946152.pdf
    • http://j-cook.pro/images/coin-master-hack-game-download_GM406889139.pdf
    • http://j-cook.pro/images/coin-master-hacks-no-verification_GM406889139.pdf
    • http://j-cook.pro/images/coin-master-free-100-spin-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a6c.bin
a25bcfbd469c03ffc70b47276f70dffd3cc3a426fa73d9080fc83ca0a34ca8da
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A6C 24652 bytes
font_01_sfnt_off000082ce.bin
c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x82CE 2896 bytes
font_02_sfnt_off00008cb3.bin
3a48050c63aabf25a2d2ed42cf8c513b78da245fbdfe2ff32403c31c4228eff7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB3 18056 bytes