Malicious PDF — malware analysis report

Static analysis result for SHA-256 79fa8beb7bbdc685…

MALICIOUS

PDF

42.5 KB Created: 2021-05-14 15:28:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5ad6e8bc508a9248ac75c4219657ff8f SHA-1: bd6f16a7e2639ecf00d1b0a8f41d247dea4bb2e5 SHA-256: 79fa8beb7bbdc6857b3fe557fcc623b691067edc12fe121ee004da5d9e0a4157
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are related to game hacks and cheats, indicating a link farm or phishing attempt. The ML classifier also flagged this PDF as malicious. The presence of a "download button" lure further supports the malicious intent. The document likely serves as a lure to direct users to malicious websites or to download further malware.

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/coin-master-facebook-hack-game-hack
    • http://safetin.ru/images/free-coin-master-spins-blog_GM406889139.pdf
    • http://safetin.ru/images/how-to-get-free-robux-codes-2021_GM431946152.pdf
    • http://safetin.ru/images/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://safetin.ru/images/real-robux-generator-2021_GM431946152.pdf
    • http://safetin.ru/images/hack-version-of-coin-master_GM406889139.pdf
    • http://safetin.ru/images/daily-free-spins-for-coin-master_GM406889139.pdf
    • http://safetin.ru/images/hack-coin-master-ios_GM406889139.pdf
    • http://safetin.ru/images/coin-master-free-spins-daily-link-game-mod_GM406889139.pdf
    • http://safetin.ru/images/real-free-spins-for-coin-master_GM406889139.pdf
    • http://safetin.ru/images/coin-master-lucky-patcher-hack_GM406889139.pdf
    • http://safetin.ru/images/free-spins-for-coin-master-ios_GM406889139.pdf
    • http://safetin.ru/images/hack-coin-master-game-download_GM406889139.pdf
    • http://safetin.ru/images/coin-master-hack-cheat-generator-d_GM406889139.pdf
    • http://safetin.ru/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdf
    • http://safetin.ru/images/coin-master-spins-and-coins_GM406889139.pdf
    • http://safetin.ru/images/freespincoin-masterlinkdownload_GM406889139.pdf
    • http://safetin.ru/images/rbxoffers-earn-free-robux_GM431946152.pdf
    • http://safetin.ru/images/get-free-spins-for-coin-master_GM406889139.pdf
    • http://safetin.ru/images/free-account-roblox-with-robux_GM431946152.pdf
    • http://safetin.ru/images/coin-master-15-free-spin-link-today_GM406889139.pdf
    • https://coinmasterspinandcoin.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046bf.bin
0f4c452f2b1fe2a6c2ed00d961a64f68d2f2faa26cc7c90f592df1718712255d
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46BF 27400 bytes
font_01_sfnt_off000084b5.bin
061f1859a06f64f15b62312cec33f4d1ae20d2ec323f296e754baff4e0335bc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x84B5 18040 bytes