Malicious PDF — malware analysis report

Static analysis result for SHA-256 f908c79eececec61…

MALICIOUS

PDF

35.3 KB Created: 2021-06-27 03:13:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8ee8a0167515775e349dec36406b75f5 SHA-1: bef1d9300c6df51c50d8af01704e7889b4fa77a3 SHA-256: f908c79eececec611587aff22f658c1802d8c50795976ff758062d0ac86bae03
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized slugs pointing to game-related cheats and hacks. The document body and extracted URLs suggest a lure to download potentially malicious content. The ML classifier also strongly indicated maliciousness.

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/cheat-hacks-in-roblox-bee-swarm-simulator-game-hack PDF link annotation
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-get-free-diamonds-in-roblox-royale-high_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-hack-peoples-accounts-on-roblox_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/roblox-pics_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B5 23008 bytes
SHA-256: 0445f36eb9ca791bcfd12699ab73f1775bcfeaadbd83d39c4323a3663b8de34d
font_01_sfnt_off00006351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6351 19612 bytes
SHA-256: e8f9cea3975dfeb440133c4799cf0953c12d35a4834cdb35df9cddd9217ee2ac

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