Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1b192f1d3773d7…

MALICIOUS

PDF

44.8 KB Created: 2021-05-15 06:05:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bb0f5d441596c84989059eca28c2f20d SHA-1: 23cc077ff5b45073bc2ae3eecf578354728ed400 SHA-256: 3d1b192f1d3773d731ae5ecec763609cb5cfc7fb5f1afcd84312a1d67bc8d899
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure, designed to lure users into downloading potentially unwanted or malicious content. The document body explicitly mentions 'Free Robux No Human Verification And No Survey' and includes a link to a generator, indicating a scam or phishing attempt. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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/431946152/free-robux-no-human-verification-and-no-survey-game-hack In PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/coin-master-village-3_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/roblox-verification_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/clean-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/roblox-re_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/114-4-hacks_GM479516143.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/coin-master-el-tiger-card-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_off00004765.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4765 29768 bytes
SHA-256: 3a3e7ff5515f538a8c03b11900fafbe547ff1acf1216d85d29f4513f2f358cee
font_01_sfnt_off00008a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A52 19328 bytes
SHA-256: d2b84e9593d62b74a5e72ac2cd252f85880eba3e829d4f4451320fa49886136c

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