Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac0ffae64c9b79ca…

MALICIOUS

PDF

30.2 KB Created: 2021-07-08 21:26:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4feaac15d76e1233d1eab83881703429 SHA-1: 418d819f3f3ca87f99762488c5e5ecd4deacf9e9 SHA-256: ac0ffae64c9b79ca8bcd87f5b4d50a970385c8f4c6a72cfde20917ee93695bb7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on what appear to be game-related hacks or free item generators. These links redirect to malicious infrastructure, specifically the domain 'netcdn.tw', which is flagged as a malicious redirector. The document body and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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/406889139/free-rare-cards-for-coin-master-christmas-game-hack In PDF document text
    • http://librarystkippgribl.com/repository/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-printable-roblox-miniature-chocolate_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-roblox-pin-numbers_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/rbx-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3175 22468 bytes
SHA-256: 101f2fc7536ce32750e55471292dc2cdd868735fa2927794b4013d969b8b7575

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