Malicious PDF — malware analysis report

Static analysis result for SHA-256 37c9faa78e411e6e…

MALICIOUS

PDF

33.5 KB Created: 2021-07-24 15:43:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 61d1172b247ed142e2c4ad24e237f1fd SHA-1: 6f2ea30a160752aaf4ae2c8c107342a7118bdb4f SHA-256: 37c9faa78e411e6e0fcc458e3b36b8ed7cd4d42f48e05533d836082841e0b362
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious infrastructure, specifically advertising free game hacks and currency. The document body and heuristics confirm the intent is to lure users to these malicious links, likely for further exploitation or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/how-to-get-free-robux-hack-game-hack In PDF document text
    • http://islamkennis.com/images/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://islamkennis.com/images/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://islamkennis.com/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://islamkennis.com/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://islamkennis.com/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://islamkennis.com/images/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://islamkennis.com/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://islamkennis.com/images/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://islamkennis.com/images/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://islamkennis.com/images/free-spins-coins-coin-master_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_off00002b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B55 23084 bytes
SHA-256: 71207415fac373f44def413614d59dffbc0ea445053a5227ef9420d4ea042bd5
font_01_sfnt_off00005f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F39 18868 bytes
SHA-256: f1cdf876f91d9e30da1238ee6bc5322a54fb60d0a8e12f5fc7ae71cdf41b6736

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