Malicious PDF — malware analysis report

Static analysis result for SHA-256 440cb1ae4ac30e86…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 21:22:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 687552e69a71cee4f359e67ff23b6abc SHA-1: 29f109d0e522c631aab739951698fcb070f3da1b SHA-256: 440cb1ae4ac30e8678caf03e0ff27d892f80d4606c47133c51ef752a9c9c1ada
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to 'netcdn.tw' and others pointing to an IP address, all promoting 'free Robux' or game hacks. These lures are commonly used to direct users to malicious websites or download malware. The ML classifier strongly indicated maliciousness, and the presence of game hack lures aligns with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://netcdn.tw/app/431946152/free-robux-2021-game-hack PDF link annotation
    • http://217.165.206.12/userfiles/files/coin-master-free-spin-link-twitter_GM406889139.pdfPDF link annotation
    • http://217.165.206.12/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/hack-coin-master-download_GM406889139.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/roblox-hack-client-we-are-devs_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/cheat-strucid-roblox_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/get-free-minecraft-account_GM479516143.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
font_00_sfnt_off00002ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF9 22204 bytes
SHA-256: 8a738588d11a1e6ac53c25f74a39ab26fe7874257be0edf83411696c0b64e460
font_01_sfnt_off00006046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6046 19116 bytes
SHA-256: bd102244ffb40c6add567cd3640126a26b927334c4b0bdc73f6a542841550b4a

Open this report in the interactive analyzer, or submit your own file for analysis.