Malicious PDF — malware analysis report

Static analysis result for SHA-256 33584842a711485b…

MALICIOUS

PDF

40.9 KB Created: 2021-04-28 01:39:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e3761804bd5eeb14ff5c9f9297cbd6ea SHA-1: 20a383abee6e9a6162cd50f581000b47adc68ed8 SHA-256: 33584842a711485b5e784a412dfce68014608d4630a7670c4a8a479f69fb2f8f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/roblox-john-doe-hacker-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/are-there-any-actual-robux-cheats-reddit.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/get-free-robux-on-robloxcom.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-jailbreak-hack-download-client.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-giver-real.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/hack-roblox-2021-savanna-wild.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/cheat-codes-for-vehicle-simulator-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/clip60-upload-avxiy74olhs-get-free-pants-roblox-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-do-you-get-free-robux-on-a-samsung.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-your-old-account-back-on-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-emperor-hack.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_off00004298.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4298 26248 bytes
SHA-256: f2763252d47b07c14da2d5f1d0f87ad5469e9180a76c597c8c24f1a13ffb2f4c
font_01_sfnt_off00007cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDC 18680 bytes
SHA-256: 191a0a06bfac6afddeb83e582dcd94ae4e18e20fad835e5aa3d981fe3dfe5c5e

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