Malicious PDF — malware analysis report

Static analysis result for SHA-256 698b62958f365d00…

MALICIOUS

PDF

44.5 KB Created: 2021-06-14 01:10:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e1c27b9a51eb9fbbf0967e20814b1bde SHA-1: d0da7c6bcd0287fea27c531c9190edb0c48a867a SHA-256: 698b62958f365d002ff2ba934334df9a4d2b3e8bf753d647ac9813f8664a5960
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as 'game hacks' or 'free generators'. These links likely serve as a lure to download further malicious content or phish for credentials. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the embedded URLs and heuristic firings are sufficient to determine the malicious intent.

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.co/app/431946152/dance-off-roblox-hack-game-hack In PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/hack-coin-master-for-iphone_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/worst-client_GM479516143.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/tiktok-free-comments_GM835599320.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/how-to-get-free-clothes-in-the-catalog-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/coin-master-free-spin-group_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_003_off0000499d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x499D 29308 bytes
SHA-256: cb0f86ac7eeec9b769e1e9fcfe3029ecbb848282365b1515d5fda6dd5e111d31
font_01_sfnt_off00008b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B55 18348 bytes
SHA-256: 66b3c636ea106ec3f52db0e25bdec8b941fdf74b55ca9916fab702a0c591776c

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