Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1badcc60d843c45…

MALICIOUS

PDF

31.7 KB Created: 2021-07-04 02:22:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 75c0b79052bce8e15da1e701a64ff842 SHA-1: a737126c09f17fb7ecb08aba8e78b842c724839b SHA-256: e1badcc60d843c455f82985154546b465fc42fe59ad626c0a001eadf7f8e4dc7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that are flagged as malicious redirectors, specifically promoting 'free Robux' or game hacks. The document body and heuristics indicate a lure to download or visit further malicious content. No scripts were extracted, but the embedded URLs and redirector heuristics strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 3

  • 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.
  • 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 http://netcdn.tw/app/431946152/rbx-free-robux-game-hack In PDF document text
    • http://windhorsetrek.com/userfiles/files/block-best-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/vehicle-simulater-roblox-hack-for-speed_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/roblox-4all-hack_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/nicsterv-roblox-hackers_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/hacks-roblox-de-volar_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-play-alone-esrly-acces-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-get-100-000-robux-for-free_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/roblox-hack-robux-pastebin_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
font_00_sfnt_off00002c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C64 22544 bytes
SHA-256: 8766ffddf4f3e8a29ec56c217569397c4b0192430df6f8f3681f9a9f51a44078
font_01_sfnt_off00005ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBF 18716 bytes
SHA-256: df5c5e0cfb8f7f2dfb35d0ecea75bc73877d40549e98d215878e07f2572b6ccc

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