Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d41dfb1c2f375d9…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 17:05:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fa1a4fcfd759fb595aaa8cd66f6eb4ba SHA-1: c9b4505c21ca0d404ac8cd1e677341ad4a4caa77 SHA-256: 8d41dfb1c2f375d9dd7c8ba75fcdce666ba23df609847e701ec1ef347fc3ca1a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising 'free generators' or 'game hacks' for popular games. The primary lure URL is http://netcdn.tw/app/406889139/spin-and-coin-game-hack, which is flagged as a malicious redirector. The document body and embedded links suggest a phishing or scam attempt to lure users to potentially 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.tw/app/406889139/spin-and-coin-game-hack In PDF document text
    • http://library.atim.ac.id/repository/roblox-free-rubux-sans-email_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-website-that-works-no-generator_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/2021-fe-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-roblox-high-school-2_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/unlimited-robux-hack-ios_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/cheat-code-roblox-bubble_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-catalog-items-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-jailbreak-free-money-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/gun-script-hack-roblox-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-clothes-no-robux-of-friends_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-may-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/bloxxer-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roam-roblox-best_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-draw-roblox-anime_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-2021-xyz_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_off00002e1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E1A 23212 bytes
SHA-256: a3b2629e4311e5c577ee63097ff073ace6f96ccf01ec2b7831ad7fd6c9eeff22
font_01_sfnt_off0000623a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623A 18080 bytes
SHA-256: 012df21d0068cf60c223a53958773a0d059661452b676895ba6a235f4df9029a

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