Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1d2ab8c2e3bd88c…

MALICIOUS

PDF

34.3 KB Created: 2021-06-19 23:56:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: db9d8745f2e01187ec99ba71028c668e SHA-1: e0684cb32c23ed304377ab002302d42f7a9befea SHA-256: b1d2ab8c2e3bd88c7f6cbb2ed1be940006a48be62d1374c495d6756bab5720de
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that lead to a known malicious redirector infrastructure, specifically promoting 'free game hacks' for Roblox. The document body and heuristics indicate a lure to download or access potentially unwanted or malicious content. Although no scripts were directly extracted, the nature of the links and the lure suggest a phishing or social engineering attack aimed at driving traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-valkyrie-helm-free-game-hack In PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/best-clicker-games-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/real-robux-codes_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/roblox-scp-foundation-model-free_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/roblox-elysian-level7-hack-exploit-new_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/free-robux_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/hacking-a-roblox-fans_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E83 22224 bytes
SHA-256: b0e2bcad8c895e0ff25a8ccbe330af24f6650fd0c6affc2977a0f807ce6f01f5
font_01_sfnt_off00005fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB2 19512 bytes
SHA-256: 93644ea1991c6e0a7ace07d9f6b4965109b286ab17cc52ddd5ebfa774f3d5d0b

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