Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5b26eb0cec0a0d6…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 21:54:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6caff16097669bafd9cfecb1ba4ec5d6 SHA-1: 60a5319a9b43c50261b106202fe79b9d7cffe832 SHA-256: d5b26eb0cec0a0d6a21407cc41ca7de0a00587f79430a0e735bc0032d4c1c1ee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free game items and hacks. The primary URL, http://netcdn.tw/app/431946152/free-roblox-accounts-game-hack, is identified as a malicious redirector. The document body and embedded links suggest a social engineering tactic to drive traffic to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-roblox-accounts-game-hack In PDF document text
    • http://xenonsvjetla.com/files/free-private-server-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-hack-roblox-bloxys-arcades_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/comment-cre-un-free-admin-sur-roblox_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/roblox-free-items_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-roblox-codes-2021-december_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/how-to-make-a-minecraft-java-server-for-free_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
stream_002_off00003014.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3014 23116 bytes
SHA-256: 9615c098e0e6327f075c16967ba64b2289bfedc912baec226cf2419b7916ef33
font_01_sfnt_off00006431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6431 18896 bytes
SHA-256: dca2f27ecdd8c5a39a81753fb954dd30ae74f07dc947ace6cc80d7c98cb68ba8

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