Malicious PDF — malware analysis report

Static analysis result for SHA-256 84c06141142f056b…

MALICIOUS

PDF

37.0 KB Created: 2021-05-24 06:09:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3dce5fc87654f4595c12f814ad9ca774 SHA-1: bce5c990452fe97d6df3f0fdca1468d549529122 SHA-256: 84c06141142f056b2ccae76f284cf4be5c607e52d829969e0ac2aa514538d382
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains that host lures for 'free generators' and 'game hacks', such as 'how to earn free robux'. The document body explicitly contains a call to action to 'CLICK HERE TO ACCESS ROBLOX GENERATOR' and includes several URLs pointing to other PDF files hosted on a suspicious domain, likely serving as further lures or payloads. The ML classifier also flagged this PDF as malicious.

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/how-to-earn-free-robux-game-hack In PDF document text
    • http://jasab.fr/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://jasab.fr/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://jasab.fr/images/free-robux-place_GM431946152.pdfIn PDF document text
    • http://jasab.fr/images/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://jasab.fr/images/coin-master-gameplay_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
font_00_sfnt_off00003448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3448 25324 bytes
SHA-256: 96343b34047ad26af408d6bdbfaf3c281d9fe5daa78ca2e6f812d171382e7fad
font_01_sfnt_off00006f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F17 18404 bytes
SHA-256: 14292e34eda5b41bb4f7162ff4266963adc8cc9da2edd2eb943feb3a845ce32e

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