Malicious PDF — malware analysis report

Static analysis result for SHA-256 54cf7de8b0f0b378…

MALICIOUS

PDF

44.1 KB Created: 2021-05-12 14:31:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f88934863fb06c4c9432daac4a58a655 SHA-1: 0d79a277fef43758ae4e62614106ca8c4ffba5f0 SHA-256: 54cf7de8b0f0b378cac1ced2470c317ca457c4ef1b220aa5597e9a3d5dafbed8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to game hack generators, specifically targeting 'Roblox' and 'Coin Master'. The heuristic firings indicate these links lead to known malicious redirector infrastructure. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or scam attempt to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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/easy-robux-hack-game-hack In PDF document text
    • http://huebner-baustoffe.de/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/what-do-roblox-points-do_GM431946152.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/free-roblox-intros_GM431946152.pdfIn PDF document text
    • https://collectrobuxIn 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_off00004976.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4976 27684 bytes
SHA-256: 93b8a12e61b44ac078f45b1f95ec2d14644d689f309d531116bace3240f65b1a
font_01_sfnt_off0000898c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x898C 18428 bytes
SHA-256: 2bceebe5c1993dbcd4316f947943b347169ed843d74f7d3766fe916d90107923

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