Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ea870bb4f8cb82…

MALICIOUS

PDF

34.0 KB Created: 2021-06-19 12:33:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9d68673b6e2885adbce79fdac368a217 SHA-1: d4bb3b55354fdaa4b54a6314407df95cf03b4340 SHA-256: 27ea870bb4f8cb82aa29496390ea89bdc974e8e3cfb6357b63ac119ab5eb7a26
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that explicitly advertises hacks and cheats for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to click on these links, likely leading to malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/hack-peoples-roblox-account-game-hack
    • https://deutsch-study.com/image/data/files/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdf
    • https://deutsch-study.com/image/data/files/robux-free-2021_GM431946152.pdf
    • https://deutsch-study.com/image/data/files/free-tiktok-followers-no-human-verification_GM835599320.pdf
    • https://deutsch-study.com/image/data/files/free-spins-link-in-coin-master-2021_GM406889139.pdf
    • https://deutsch-study.com/image/data/files/coin-master-free-spins-and-coins-app_GM406889139.pdf
    • https://deutsch-study.com/image/data/files/coin-master-hack-xyz-download-free_GM406889139.pdf
    • https://deutsch-study.com/image/data/files/coin-master-free-spins-fb_GM406889139.pdf
    • https://deutsch-study.com/image/data/files/coin-master-70-spin-link-today_GM406889139.pdf
    • https://deutsch-study.com/image/data/files/toolbox-for-minecraft-pe-ios_GM479516143.pdf
    • https://deutsch-study.com/image/data/files/minecraft-pocket-edition-mods-for-free_GM479516143.pdf
    • https://deutsch-study.com/image/data/files/coin-master-33-hack-version-download_GM406889139.pdf
    • https://deutsch-study.com/image/data/files/free-tiktok-followers-and-likes_GM835599320.pdf
    • https://deutsch-study.com/image/data/files/coin-master-free-spins-2021-app-download_GM406889139.pdf
    • https://deutsch-study.com/image/data/files/free-coin-master-account_GM406889139.pdf
    • https://deutsch-study.com/image/data/files/coin-master-hack-pro-gamers_GM406889139.pdf
    • https://deutsch-study.com/image/data/files/how-to-get-2021-robux-for-free_GM431946152.pdf
    • https://deutsch-study.com/image/data/files/free-coin-master-hacks_GM406889139.pdf
    • https://deutsch-study.com/image/data/files/promo-code-free-robux_GM431946152.pdf
    • https://deutsch-study.com/image/data/files/coin-master-35-13-hack-download_GM406889139.pdf
    • https://deutsch-study.com/image/data/files/roblox-ninja-assassin-cheat-engine_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ddb.bin
97d04ce8414d96cbf149db30681cf2c60cf195e8f136ccf025feb672cafa3807
pdf-font-stream PDF embedded font (sfnt) at offset 0x2DDB 22184 bytes
font_01_sfnt_off00005f14.bin
a554ffcb3f6f0ff1801f8c9d583fb316895c4d9906e95b37ec2330996a81e8c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F14 19232 bytes