Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1b399761f456ba2…

MALICIOUS

PDF

41.1 KB Created: 2021-05-18 02:45:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6a0c4c4a5b86906706d849c1f843f598 SHA-1: ad899a84e39b99c33c4ca451a517ea905e56a22f SHA-256: d1b399761f456ba26589553f350e609eb548eff8971ab3080f9884b1cffeebff
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a link farm, suggesting a phishing or malware distribution attempt. The document body and extracted URLs promote free game resources like Minecraft and Coin Master spins, which are common lures. The presence of a PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely to further phishing or malware sites.

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/479516143/free-minecraft-for-kids-game-hack
    • http://finettifrs.it/images/official-coin-master-free-spins_GM406889139.pdf
    • http://finettifrs.it/images/online-hacking-tricks-coin-master_GM406889139.pdf
    • http://finettifrs.it/images/feb-23-2021-free-coin-master-spins_GM406889139.pdf
    • http://finettifrs.it/images/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://finettifrs.it/images/free-spins-for-coin-master-game_GM406889139.pdf
    • http://finettifrs.it/images/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdf
    • http://finettifrs.it/images/offers-for-robux_GM431946152.pdf
    • http://finettifrs.it/images/free-daily-spins-coin-master_GM406889139.pdf
    • http://finettifrs.it/images/500-free-coin-master-spins_GM406889139.pdf
    • http://finettifrs.it/images/coin-master-links-for-free-spins-2021_GM406889139.pdf
    • http://finettifrs.it/images/how-to-get-free-robux-2021_GM431946152.pdf
    • http://finettifrs.it/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://finettifrs.it/images/minecraft-java-free-download_GM479516143.pdf
    • http://finettifrs.it/images/my-roblox-account-was-hacked_GM431946152.pdf
    • http://finettifrs.it/images/wurst-115-2_GM479516143.pdf
    • http://finettifrs.it/images/oprewards-com-login_GM431946152.pdf
    • http://finettifrs.it/images/free-vip-server-roblox_GM431946152.pdf
    • http://finettifrs.it/images/coin-master-free-link-spin_GM406889139.pdf
    • http://finettifrs.it/images/roblox-hacked-version_GM431946152.pdf
    • http://finettifrs.it/images/roblox-earn_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004645.bin
1c5eeb4fdd9254609731eac5ecf1288c490d4deb24cff617379c9193d09828b2		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4645 25032 bytes
font_01_sfnt_off00007f9a.bin
db9aaf58ea00c011e8bfb0bda6e5c72a5ee10e2312103ce2cdee42fc8763a3fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9A 17884 bytes

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