Malicious PDF — malware analysis report

Static analysis result for SHA-256 11aadea5fe2cb49f…

MALICIOUS

PDF

42.8 KB Created: 2021-05-11 17:34:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 0e10930e53f055153b337cffa156b3b4 SHA-1: 0d25ae9fbd31ee783c861dfb6cbbd2439c8e4b03 SHA-256: 11aadea5fe2cb49fec8019ea5dea51ea2a5f3ca37e88684c0a907eb74e41830a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to known malicious redirectors, specifically advertising game-related cheats and currency. The primary redirector URL is https://netcdn.xyz/app/431946152/roblox-pics-game-hack, which likely serves as a lure to download further malicious content or phish for credentials. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-pics-game-hack In PDF document text
    • http://tc-kulmbach.de/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/earn-roblox_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/how-to-get-free-minecraft-coins_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
font_00_sfnt_off00004ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AD3 25864 bytes
SHA-256: ddee2a394a856c6b386d149a7addaa0258e285a26c6051dd91d7d450bf3972fa
font_01_sfnt_off000085c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C4 18060 bytes
SHA-256: 4ad043eb0dd1568e4a2653429ea485ab96dada409891d91a29e15aee7c370b08

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