Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bf2b502f92879f3…

MALICIOUS

PDF

44.2 KB Created: 2021-05-19 05:49:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cb680af4d110f87287846d74b7df4cb7 SHA-1: ac88c9d2b80ef68f8686ff577f6da25dbb51629e SHA-256: 6bf2b502f92879f34492ec782a07f13566091401c72e2208bc5ff6039b0e187b
102 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are SEO-optimized and point to other PDF files related to popular games like Coin Master and Roblox. This suggests a link farm designed to attract users with promises of hacks or free in-game currency, likely leading to malicious downloads or further phishing attempts. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/http-bit-ly-coin-master-hack-game-hack
    • http://www.homesweethome.pl/images/free-games-coin-master_GM406889139.pdf
    • http://www.homesweethome.pl/images/can-i-get-minecraft-for-free_GM479516143.pdf
    • http://www.homesweethome.pl/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://www.homesweethome.pl/images/free-robux-generator-2021-no-survey_GM431946152.pdf
    • http://www.homesweethome.pl/images/coinmaster-hack_GM406889139.pdf
    • http://www.homesweethome.pl/images/robuxglobalcom_GM431946152.pdf
    • http://www.homesweethome.pl/images/how-to-change-your-name-in-roblox-for-free_GM431946152.pdf
    • http://www.homesweethome.pl/images/free-spins-coin-master-ios-2021_GM406889139.pdf
    • http://www.homesweethome.pl/images/coin-master-daily-free-spins-2021_GM406889139.pdf
    • http://www.homesweethome.pl/images/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdf
    • http://www.homesweethome.pl/images/minecraft-pe-texture-packs-free-download_GM479516143.pdf
    • http://www.homesweethome.pl/images/coin-master-spin-hack_GM406889139.pdf
    • http://www.homesweethome.pl/images/free-spin-in-coin-master_GM406889139.pdf
    • http://www.homesweethome.pl/images/minecraft-java-free_GM479516143.pdf
    • http://www.homesweethome.pl/images/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdf
    • http://www.homesweethome.pl/images/robux-hack-no-human-verification_GM431946152.pdf
    • http://www.homesweethome.pl/images/daily-free-spins-on-coin-master_GM406889139.pdf
    • http://www.homesweethome.pl/images/free-robux-legit_GM431946152.pdf
    • http://www.homesweethome.pl/images/free-robux-no-downloading-apps_GM431946152.pdf
    • http://www.homesweethome.pl/images/free-spins-on-coin-master-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a5e.bin
8be74d96c391bdea3aa98dbac7101077912cde2d371f27052a64d60997ae3142
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A5E 24268 bytes
font_01_sfnt_off0000804a.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
pdf-font-stream PDF embedded font (sfnt) at offset 0x804A 2880 bytes
font_02_sfnt_off00008a34.bin
5fbed04530fd5233e85522bcf95dabe2bab0495a9adc2bbbbcde83bb79acff30
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A34 18288 bytes