Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e7ac548fff6ab3…

MALICIOUS

PDF

42.5 KB Created: 2021-05-10 20:06:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: bc9d9a7b9dd4566ca0cdabb0bb71a81d SHA-1: 002918f9c518f467e821613325221e0fda230e2b SHA-256: 63e7ac548fff6ab3e5bba08220eeb6a91667197b038676668ac76289c632679d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external URLs, including one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure for game-related cheats or resources. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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/406889139/coin-master-daily-free-spins-link-facebook-game-hack In PDF document text
    • https://ceranique.nl/images/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/roblox-robux-page_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/free-robux-net_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/master-game_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/free-robux-app_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://ceranique.nl/images/free-roblox-groups_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/mathep_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/free-robux-2021-no-human-verification_GM431946152.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_003_off00004a35.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A35 25404 bytes
SHA-256: 87d1053252d2b9051c43fb7c99a78087e4787579f98b487c92e1ad948f03f882
font_01_sfnt_off00008289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8289 18636 bytes
SHA-256: 50d107b0548bd3d005e8b5e4f9cf847a43b3082c8a2089b5591d39299d79db66

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