Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37265ecfb5243f7…

MALICIOUS

PDF

45.4 KB Created: 2021-05-13 08:48:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5b765babc3c004d34688260d848bc81a SHA-1: d900139d737f954ae3c01a68a01124903bdaea24 SHA-256: d37265ecfb5243f7c00b04d182a53bc4ad7b0e21216deb2d6558ccbdc03ffd11
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links and a document body that promotes hacking and free in-game currency, strongly suggesting a lure for phishing or malware distribution. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many of which are likely malicious or lead to malicious content. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/how-to-hack-roblox-accounts-2021-easy-game-hack PDF link annotation
    • http://www.lowrange4x4.co.za/images/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.lowrange4x4.co.za/images/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://www.lowrange4x4.co.za/images/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • http://www.lowrange4x4.co.za/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.lowrange4x4.co.za/images/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • http://www.lowrange4x4.co.za/images/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://www.lowrange4x4.co.za/images/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://www.lowrange4x4.co.za/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://www.lowrange4x4.co.za/images/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.lowrange4x4.co.za/images/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • http://www.lowrange4x4.co.za/images/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://www.lowrange4x4.co.za/images/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.lowrange4x4.co.za/images/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://www.lowrange4x4.co.za/images/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://www.lowrange4x4.co.za/images/how-to-hack-coin-master-with-game-guardian_GM406889139.pdfIn PDF document text
    • http://www.lowrange4x4.co.za/images/www-robux-us_GM431946152.pdfIn PDF document text
    • http://www.lowrange4x4.co.za/images/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://www.lowrange4x4.co.za/images/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://www.lowrange4x4.co.za/images/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://www.lowrange4x4.co.za/images/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://wolfzscriptsIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a05.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A05 24712 bytes
SHA-256: dee1422c99212f8b069b15560b3ccd6e6f1ee590ef23a553b8503c393e3d592c
font_01_sfnt_off00008239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8239 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00008bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BEA 19172 bytes
SHA-256: 0a4c192dd0d49b475d670e2028b2e3d9bc88486e58824ff416e2d46c0acce708

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