Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c079bb51343a67d…

MALICIOUS

PDF

44.8 KB Created: 2021-05-17 06:32:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: caf821d8e0d0a81c8c1f041d9bf921db SHA-1: 6a41868c2f3b473ac85480cdef42d6f9437520ae SHA-256: 1c079bb51343a67dfdda79773f363728e6ab1ccc4b9aa094e869e7fe4b259517
122 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are presented as download opportunities for popular games like Minecraft and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users. The ML classifier also flagged this PDF as malicious with high confidence. The presence of these links, combined with the document's structure, indicates an attempt to lure users to download potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 5

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/minecraft-1.16-free-download-game-hack
    • http://eddieblum.nl/images/roblox-free-robux-codes_GM431946152.pdf
    • http://eddieblum.nl/images/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdf
    • http://eddieblum.nl/images/free-spin-coin-master-today_GM406889139.pdf
    • http://eddieblum.nl/images/how-do-you-hack-minecraft_GM479516143.pdf
    • http://eddieblum.nl/images/free-spins-coin-master-blogspot_GM406889139.pdf
    • http://eddieblum.nl/images/minecraft-18-9-hacked-client_GM479516143.pdf
    • http://eddieblum.nl/images/adopt-me-roblox-hacks_GM431946152.pdf
    • http://eddieblum.nl/images/claim-free-robux_GM431946152.pdf
    • http://eddieblum.nl/images/android-coin-master-3433-apk-hack_GM406889139.pdf
    • http://eddieblum.nl/images/free-robux-easy-and-fast_GM431946152.pdf
    • http://eddieblum.nl/images/free-robux-generator-2021-no-survey_GM431946152.pdf
    • http://eddieblum.nl/images/minecraft-education-edition-free-download_GM479516143.pdf
    • http://eddieblum.nl/images/coin-master-hack-pc-free_GM406889139.pdf
    • http://eddieblum.nl/images/how-to-get-free-outfits-on-roblox_GM431946152.pdf
    • http://eddieblum.nl/images/free-links-for-coin-master-2021_GM406889139.pdf
    • http://eddieblum.nl/images/coin-master-hack-online-android_GM406889139.pdf
    • http://eddieblum.nl/images/how-to-get-free-robux-instantly_GM431946152.pdf
    • http://eddieblum.nl/images/coin-master-stop-attack-hack_GM406889139.pdf
    • http://eddieblum.nl/images/coin-master-coins-hack_GM406889139.pdf
    • http://eddieblum.nl/images/how-to-get-free-roebucks_GM431946152.pdf
    • https://freegiftcodes.eu
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004902.bin
7f65dba460924939b3988b827adbd5079f8b7184a5aec7db08c16c90d82f0dbd
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4902 24832 bytes
font_01_sfnt_off00008196.bin
787e0768241fb57660bcc9c7f726cf687277c463cdf8c586c4782ee9d03c3606
pdf-font-stream PDF embedded font (sfnt) at offset 0x8196 2840 bytes
font_02_sfnt_off00008b55.bin
0e8b49a0fd1b3c410e06b9d1dbb2d3e902ee20fcf98882da412ea2fefe7e2ea5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B55 18628 bytes