Malicious PDF — malware analysis report

Static analysis result for SHA-256 c96462b8a0d1d790…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 06:21:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 37a5c96252933709628976ff2ce74810 SHA-1: a43e34e06000d42a33512997f47c9f45814a6d65 SHA-256: c96462b8a0d1d7902d2bf5daedd66c949e9a4c1f9c19a79060136d457f24892e
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, including a known malicious redirector at `https://netcdn.online/app/406889139/coin-master-hack-tips-game-hack`. The document body and heuristics indicate a lure related to game hacks and generators, suggesting a phishing or malware distribution attempt. The presence of multiple links to `de-licht.com` hosting PDF files related to game exploits further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.online/app/406889139/coin-master-hack-tips-game-hack In PDF document text
    • https://de-licht.com/image/data/files/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://de-licht.com/image/data/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/roblox-f1-track-free_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/roblox-executor-free_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • https://de-licht.com/image/data/files/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/install-free-game-coin-master_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/coin-master-hack-without-human-verification-2021_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
stream_004_off00004fee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FEE 24944 bytes
SHA-256: 485d1681d9721865aa2a3e42f1cc026f48b7ee2234e3c921edfe6b245fb02f5d
font_01_sfnt_off00008997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8997 17892 bytes
SHA-256: 1fa242315f10f3fa2c9711447fa9857a94e1f1f203c41df7b4d39f1f5d94ad78

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