Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac7196b74bfca65…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 18:17:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bb899ae246ff73f75e5fcb42cddc108f SHA-1: 30e9b355c5f2df9842842f26bfecb7fe2326808f SHA-256: 5ac7196b74bfca652e4630444b56fa5aa32d69d113430a4ffce58495f81499ce
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and websites offering 'free generators' or 'hacks' for popular games, indicating a phishing or scam attempt. The embedded URLs are designed to lure users to potentially harmful sites, likely for credential harvesting or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/daily-coin-master-game-hack In PDF document text
    • http://razredna-nastava.net/files/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/tiktok-free-iphone_GM835599320.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/husky-800m-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-ohne-handynummer-und-menschliche-ver_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-robux-no-inspecting_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-password-hacker-august-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-free-models_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/tiktok-for-free-textbooks_GM835599320.pdfIn PDF document text
    • https://razredna-nastava.net/files/hmm-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-gold-cards-free_GM406889139.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_off0000309d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x309D 23808 bytes
SHA-256: 8e35eb04039a9cef600cedcb109511f366d5943d70c5da6fb1305579a6b6568b
font_01_sfnt_off0000662d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x662D 18256 bytes
SHA-256: 4b4ebf8e9dec0048657ccfe2daaf89c536ab9e799ac439a9c3dc84db67dbacbd

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