Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f12e6d21f3c963…

MALICIOUS

PDF

37.2 KB Created: 2021-05-21 22:38:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3448f9a7230c6615e4b3a70d2004f230 SHA-1: 8a365465930bf0fdfa25590c7d0f4d9886d88f47 SHA-256: 96f12e6d21f3c963b51306fbf89e2ac7fc01ba712ae00dbfacdbd3653b06a57f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document uses a lure related to 'Roblox Hacks 2021' and contains multiple embedded links pointing to websites that offer game hacks and generators. These links are associated with known malicious redirector infrastructure, indicating a likely attempt to trick users into downloading malware or engaging in fraudulent activities. The presence of multiple redirector links and the ML classifier flagging this PDF as malicious strongly support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/roblox-hacks-2021-game-hack In PDF document text
    • https://www.xenonsvjetla.com/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/minecraft-pe-apk_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_off0000324e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x324E 25848 bytes
SHA-256: e26592801e7555d497d23240989fb82e7b3a0c01c9644022b62f3fd53cfa76f6
font_01_sfnt_off00006ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED3 18584 bytes
SHA-256: 09e382df304bf090e7d4979f9a4a25aa7e11969d647bdc760e706e621b680adc

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