Malicious PDF — malware analysis report

Static analysis result for SHA-256 91162342ad1e514a…

MALICIOUS

PDF

42.4 KB Created: 2021-05-17 12:39:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 87865fc1b5b98c792a822f806c33f5cd SHA-1: ee863717b346a146301b3432f5f0e99847bb2cbe SHA-256: 91162342ad1e514afe15a115fee4ef8629135fd7ca7f88eac1aa83faccc6cb20
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting "game hacks" and "generators" to lure users. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a visual download button further supports a phishing or scamming attempt. Although no scripts were directly extracted, the PDF structure itself facilitates the redirection, likely leading to a further stage of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/daily-spins-coin-master-game-hack In PDF document text
    • https://verstricktundzugenaeht.com/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/free-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/www-robux_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/minecraft-dungeons-free_GM479516143.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_003_off00004aa3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AA3 25228 bytes
SHA-256: 890421126eb68b969c88deb985aaca36a82b425067c39a20b11cd84b1b698792
font_01_sfnt_off000083c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C9 18144 bytes
SHA-256: 1262f4d4cd034a4c9562a277dbba73095a6416475eb754b173a4e193cc6b3510

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