Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f7d40ffea41a10…

MALICIOUS

PDF

42.2 KB Created: 2021-05-18 04:43:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5bc26cc806662e2b591a322dd1aae77c SHA-1: 83b7745648e4f6fcd0ec758a38b2785a2cc3521c SHA-256: d5f7d40ffea41a1012efe355d7098fb0c59ba3f58d0e5c669c3e5623fca750f1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one critical heuristic identifying it as a lure for 'free generator / game hack' sites. This link, https://netcdn.xyz/app/431946152/free-robux-pin-codes-game-hack, is flagged as malicious redirector infrastructure. The document body, though partially corrupted, also contains references to 'Free Robux Pin Codes' and other game-related lures, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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/431946152/free-robux-pin-codes-game-hack In PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-free-2021_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/easy-robux-generator_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-100-spin_GM406889139.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_off0000496e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x496E 24732 bytes
SHA-256: 5b6157056fa0888838ee0af0c3d2016f2119f9a4b116ad68ee17a2ae4d1284b0
font_01_sfnt_off0000823a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x823A 18464 bytes
SHA-256: 23872266a6577b01853888d52c04c526ac323517b7f86f8cb64f3b9e81653507

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