Malicious PDF — malware analysis report

Static analysis result for SHA-256 782b5f9446c98b21…

MALICIOUS

PDF

35.7 KB Created: 2021-07-09 23:29:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-16
MD5: 78f79d853e6087f186e5b136cdef0c84 SHA-1: 73b0148897cdd99aa234686923cab57fe4644b1e SHA-256: 782b5f9446c98b215fe34805c379dc97d19dfa58bfa89a6d19c8ba9a3a18cc3c
160 Risk Score

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/coin-master-hack-2021-app-game-hack In PDF document text
    • http://www.donjastubica.hr/files/free-tiktok-accounts-and-passwords_GM835599320.pdfIn PDF document text
    • http://www.donjastubica.hr/files/pokemon-go-free-accounts-2021_GM1094591345.pdfIn PDF document text
    • http://www.donjastubica.hr/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-robux-real_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-roblox-accounts-pastebin-2021_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-get-free-robux-no-waiting-or-inspect_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/electrification-free-robux_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/roblox-vouchers-free_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-roblox-templates_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/hack-roblox-hack-robux_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
stream_002_off000032f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32F8 23404 bytes
SHA-256: bedb9acf558db6384c3f723f0d1ae81b4f4b639185a788590ca5d9ba2ba2909c
font_01_sfnt_off000067e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E7 18580 bytes
SHA-256: 9ee7f6e729eaa8ccfa60f836f488dcd9dbdf367b2dcb4736acc286b6369c8b6e

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