Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d8fa3c5ca02a637…

MALICIOUS

PDF

42.7 KB Created: 2021-05-13 01:45:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 68da3070ec31c694be78f170ecaebdcb SHA-1: 63ec3a5ec4e30f37afc025ae5dba1b232e2ee3ee SHA-256: 3d8fa3c5ca02a6372bbcca5f8beddeba6f260cd5d82174fe8bdfa26a02e6b640
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are SEO-optimized and point to sites offering game cheats and currency. The primary URL, https://netcdn.xyz/app/431946152/roblox-download-game-hack, suggests a lure for downloading game-related exploits. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent. No scripts were extracted, but the document's structure and embedded URLs point towards a phishing or malware distribution attempt.

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/431946152/roblox-download-game-hack PDF link annotation
    • http://moneymaker-gold.de/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://moneymaker-gold.de/files/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://moneymaker-gold.de/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47F9 25556 bytes
SHA-256: 0ebad2c32450aaf6b88b7df2a085ff719c83caa481c97b5da19c8c5aee28723d
font_01_sfnt_off00008388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8388 18520 bytes
SHA-256: 21b28ace4d932993d49d3193db8b098f0f06cc97e3b5056ef7549ebd787d2b01

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