Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d282d353ed5f2f…

MALICIOUS

PDF

45.7 KB Created: 2021-05-20 05:39:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 19264985318c4e655dce00d68d4dbee6 SHA-1: 3de18ae772eb087ce1463512ab865421023210b2 SHA-256: c0d282d353ed5f2ff457900f25cc8e26110f816be7e8481ec67b0d6f6237eb53
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF links. The document body and extracted URLs suggest a lure for free in-game items or currency for games like Roblox and Coin Master. The presence of a PDF link farm heuristic indicates a high volume of outbound links designed to attract traffic, likely for phishing or scam purposes. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/431946152/roblox-hair-for-free-game-hack
    • http://www.bripi.pl/images/generator-robux_GM431946152.pdf
    • http://www.bripi.pl/images/coin-master-spins-and-coins_GM406889139.pdf
    • http://www.bripi.pl/images/roblox-pics_GM431946152.pdf
    • http://www.bripi.pl/images/coin-master-free-daily-spins_GM406889139.pdf
    • http://www.bripi.pl/images/coin-master-free-coins-link-blogspot_GM406889139.pdf
    • http://www.bripi.pl/images/coin-master-free-coins-and-spins-link-today_GM406889139.pdf
    • http://www.bripi.pl/images/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdf
    • http://www.bripi.pl/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
    • http://www.bripi.pl/images/coin-master-hacked-apk-download-for-android_GM406889139.pdf
    • http://www.bripi.pl/images/minecraft-bedrock-hacks_GM479516143.pdf
    • http://www.bripi.pl/images/coin-master-unlimited-spin-hack_GM406889139.pdf
    • http://www.bripi.pl/images/coin-master-hack-2021_GM406889139.pdf
    • http://www.bripi.pl/images/coin-master-new-link-free-spin_GM406889139.pdf
    • http://www.bripi.pl/images/robux-free-online_GM431946152.pdf
    • http://www.bripi.pl/images/hack-free-spin-coin-master_GM406889139.pdf
    • http://www.bripi.pl/images/free-coins-coin-master-no-human-verification_GM406889139.pdf
    • http://www.bripi.pl/images/free-spin-coin-master-twitter_GM406889139.pdf
    • http://www.bripi.pl/images/how-to-get-free-minecoins-in-minecraft_GM479516143.pdf
    • http://www.bripi.pl/images/coin-master-free-spins-link-today_GM406889139.pdf
    • http://www.bripi.pl/images/how-to-hack-minecraft-pe_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000483d.bin
75688d86cdcd4ce9b6cb6d390e1b67a758e7d390a015ce1fe583c3e08d7a0363
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x483D 25908 bytes
font_01_sfnt_off00008466.bin
e49a868379cd3c37e631c5a53c010e21f38d803532a2b8417aee82315d4e8634
pdf-font-stream PDF embedded font (sfnt) at offset 0x8466 3500 bytes
font_02_sfnt_off00009008.bin
071abe11bc505b6fd5896db9ed6c4248165c6521bf389675a89e7515009c04ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x9008 18296 bytes