Malicious PDF — malware analysis report

Static analysis result for SHA-256 4050d6a6f3c5fc46…

MALICIOUS

PDF

50.5 KB Created: 2021-06-09 11:14:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b55efdf1f719360aff1d31b9304c5c1c SHA-1: 507c72e55f1649cd17b872e09cf79c3f0f0cc9b6 SHA-256: 4050d6a6f3c5fc467368b1957f98671376f431ae3cceba856b4295d37cf93fcd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as 'free generators' or 'game hacks' for popular games. The document body and heuristics indicate a lure to download or visit these sites, which likely leads to further malware or phishing. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9711

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.tw/app/431946152/free-pet-roblox-pet-simulator-game-hack In PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/tiktok-free-jeton_GM835599320.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/hacks-para-pet-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-roblox-accounts-with-bc_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-codes-may-2021_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-how-to-cheat-on-obstacle-paradise_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/yammy-roblox-hacking_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5378 28316 bytes
SHA-256: 0aeef77205cddc842015e3a7b6f6c9ea61f020eb22bcdf96a35a887704e13fb1
font_01_sfnt_off0000941c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x941C 3992 bytes
SHA-256: 43e72e756231cfd354bd65c2ed3b09ad4eff56ad11e7f155ed2920e6bb7860dd
font_02_sfnt_off0000a142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA142 18952 bytes
SHA-256: ee582dc0b1ca1d5bf1b4fe11f3ba0b451acd232711168fbc08c750f1974fb467

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