Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e8da1d5a1abc3f8…

MALICIOUS

PDF

48.8 KB Created: 2021-06-03 07:05:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3bcaec887e0cd33ecc1d8df212c2b1e0 SHA-1: e78bd2ecf42aac17accb3e8440ca7412c28d3cac SHA-256: 8e8da1d5a1abc3f8f9321926e67a99fefb4e6d7df9afda313f23532082ed3384
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, specifically promoting 'game hacks' and 'free generators' to lure users. The document body and embedded links strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/431946152/how-to-hack-roblox-to-get-free-robux-game-hack In PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/how-to-get-free-likes-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/how-to-get-free-robux-easy_GM431946152.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
stream_004_off000055a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55A4 24236 bytes
SHA-256: e79f6874043f526220ca9a00e46f650c8f7acca0241cc5c255771231d4dc96d3
font_01_sfnt_off00008d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D14 3864 bytes
SHA-256: 9efeda0342e19a366e52cf89d13167ce63c58f1b850caff7468641aa59880166
font_02_sfnt_off00009a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A70 18756 bytes
SHA-256: a768fd9037f2962d7d468f6b0310abba3890de72b41426d235b5de2790bab1ac

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