Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b7149a2a2dcb039…

MALICIOUS

PDF

43.8 KB Created: 2021-05-17 10:30:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3251bd28fdf2a805b944a434d482a97d SHA-1: 7fc2cf3cb39b47bfcb080746822e914da4f7047c SHA-256: 9b7149a2a2dcb03919afb4bd1a6aa9ac004579f0c57d10325f58ee58ca47a59a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a lure related to 'free Robux' and game hacks, directing users to malicious redirectors. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack designed to lead users to potentially malicious content or further downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-get-free-robux-on-ipad-game-hack In PDF document text
    • http://solidcom.de/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://solidcom.de/images/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://solidcom.de/images/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://solidcom.de/images/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://solidcom.de/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://solidcom.de/images/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://solidcom.de/images/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://solidcom.de/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://solidcom.de/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://solidcom.de/images/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://solidcom.de/images/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://solidcom.de/images/minecraft-items_GM479516143.pdfIn PDF document text
    • http://solidcom.de/images/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://solidcom.de/images/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • http://solidcom.de/images/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://solidcom.de/images/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
    • http://solidcom.de/images/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • http://solidcom.de/images/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://solidcom.de/images/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://solidcom.de/images/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048b6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B6 26480 bytes
SHA-256: 62f553b8bbbbf2beda1b1b020e2ae074ece4f26d27d4526f5f110bf05ab656aa
font_01_sfnt_off000086e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E0 18860 bytes
SHA-256: df018bfb15659bb80b7243956be10673ebd99e13a4c75edb6b924f306f4c3bfe

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