Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d451b4bc73f5be…

MALICIOUS

PDF

44.9 KB Created: 2021-05-13 07:35:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6d7e0d6dd71858deb7a7314fe0fe08c4 SHA-1: 66a37a40ecfdf4f99dc96a2ea731af8208492f34 SHA-256: a0d451b4bc73f5be11028938fb2889f5f7b1871eae77e36d4888f98330be3c6c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as a 'free generator / game hack'. The primary URL, https://netcdn.xyz/app/406889139/coin-master-app-hack-game-hack, is flagged as malicious. The document body and embedded links suggest a lure for users seeking in-game currency or cheats, a common tactic for phishing or malware distribution. No scripts were extracted, but the redirector's nature implies it serves as a gateway to malicious payloads or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/coin-master-app-hack-game-hack In PDF document text
    • https://gimnaziya6.kz/images/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/coin-master--hack_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • https://gimnaziya6.kz/images/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • https://gimnaziya6.kz/images/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://gimnaziya6.kz/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/is-roblox-studio-free_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_003_off00004af1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AF1 24936 bytes
SHA-256: 39d368714648805b167300303c787bc88131b80c084406562bef8780a1a76b37
font_01_sfnt_off0000846f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x846F 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00008e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E10 17892 bytes
SHA-256: 38569bedbe5996f2827c101678e23308efeb8581fe2a57cd3cb5ddc3bbed0d22

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