Malicious PDF — malware analysis report

Static analysis result for SHA-256 640dee38108e9e4c…

MALICIOUS

PDF

49.0 KB Created: 2021-05-20 01:54:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 64d4000b845d4147f9c3a6f4dc0c5c1c SHA-1: 0e86aaac8d9c9dce787055193eadae739018091d SHA-256: 640dee38108e9e4c1fb5176f98cb81646419785a2b3256d1c634d7dd6a5adbf0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic firing for a 'game hack' lure, directing users to a suspicious URL. The document body and embedded URLs reinforce this theme, suggesting a scam designed to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a likely attempt to redirect users to a malicious resource, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/robux-get-com-game-hack PDF link annotation
    • http://whiteyaknepal.com/userfiles/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/coin-master-homepage_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-games-coin-master_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/rbx-roblox_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/coin-master-free-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AB2 24740 bytes
SHA-256: 40559d026d6b0a885b77723987fcb04fc7e3b6a7ce2b41eeff28d4487bc7701b
font_01_sfnt_off000083b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B1 3964 bytes
SHA-256: f6b9a386ee4e0aff622a98b2230905da71eab0ca98398cb52018fda3528d3e2a
font_02_sfnt_off0000910e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x910E 3396 bytes
SHA-256: e59bc53cd4c0ee65dc1533becad2866f345dcb060e6c68bb8187d21cb9f973ee
font_03_sfnt_off00009d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D00 18216 bytes
SHA-256: 9674d911dd5af8fa2579bed4a08b4e3897c440b83d0577b8271b2c1cb113a8dc

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