Malicious PDF — malware analysis report

Static analysis result for SHA-256 8358d71cc830f309…

MALICIOUS

PDF

34.8 KB Created: 2021-06-20 07:25:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1a262f8e3c6f65d892537164a74fa8d7 SHA-1: b1a7a33e3adc60d57e40babd5acd8f15514655ff SHA-256: 8358d71cc830f309eeb23539178ded3d8972db8b15e8cb4541199e114d431bb3
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 generators for game currency or hacks. The document body explicitly mentions 'Comment Avoir Des Robux Sans Hack' and includes the malicious URL, indicating a lure to a scam or potentially a phishing site. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to harmful content.

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/comment-avoir-des-robux-sans-hack-game-hack In PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-game_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/pubg-uc-generator_GM1330123889.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/i-got-cheated-on-roblox-what-can-i-do_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/completely-free-robux_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/cone-master_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-hoe-to-get-extra-free-spins_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
font_00_sfnt_off00003086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3086 22280 bytes
SHA-256: b3cd639d371c14844d38d3d19ccb64585026cce1d89913fae38084dbd045e076
font_01_sfnt_off000061c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C8 19488 bytes
SHA-256: 432eead93f671e23f8434e00a0517618dd78d276496b0a7f3c2e618dbd7aac99

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