Malicious PDF — malware analysis report

Static analysis result for SHA-256 33936d5d4e2a6293…

MALICIOUS

PDF

41.9 KB Created: 2021-05-12 23:00:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c8eb07f5ead218d5c9343f0c8c3cd9b8 SHA-1: c021533eecd763165f567bc0ce5fa2eda1747ae8 SHA-256: 33936d5d4e2a6293a4f3abbb993a2d2d9c080c2f68d021098a19f69bf7370b12
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF document contains multiple links to redirector domains, including one identified as malicious infrastructure. The document body and heuristics indicate a lure for 'game hacks' or 'generators', suggesting a phishing or malware distribution attempt. The presence of a clipboard command lure further supports the malicious intent, encouraging users to execute commands, likely to download and run a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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
  • 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/best-free-minecraft-hacked-client-game-hack In PDF document text
    • http://leigraphics.com/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://leigraphics.com/images/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://leigraphics.com/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://leigraphics.com/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://leigraphics.com/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://leigraphics.com/images/free-robux-download_GM431946152.pdfIn PDF document text
    • http://leigraphics.com/images/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://leigraphics.com/images/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://leigraphics.com/images/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://leigraphics.com/images/roblox-army-robux_GM431946152.pdfIn PDF document text
    • http://leigraphics.com/images/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://leigraphics.com/images/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://leigraphics.com/images/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://leigraphics.com/images/robux-xyz_GM431946152.pdfIn PDF document text
    • http://leigraphics.com/images/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://leigraphics.com/images/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • http://leigraphics.com/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://leigraphics.com/images/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://leigraphics.com/images/robux-gainer_GM431946152.pdfIn PDF document text
    • http://leigraphics.com/images/claim-roblox_GM431946152.pdfIn PDF document text
    • https://discord.ggIn 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_off0000497a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x497A 24620 bytes
SHA-256: c516fb47a45e5688b36c6a3a718005c3ce4799767eff99e9f04b07496322e9dd
font_01_sfnt_off000081db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81DB 18200 bytes
SHA-256: dee6b3909f49c7ddbb1ab18ee008f1775ca59041fcbdd753e186a80ce5ffdd4d

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