Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05205dc37ed61e4…

MALICIOUS

PDF

42.5 KB Created: 2021-05-16 09:12:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d617b4ba8de51e597525b4fd49c52082 SHA-1: 587e4f76d109c667240d198b9f6d8c309c0040f5 SHA-256: b05205dc37ed61e4bda5bd2ce8353b42dc2bfe396b6afcc0311b95d3b0fcb117
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirector infrastructure, specifically targeting users with lures related to game hacks and free currency. The document body and heuristic firings confirm the intent to redirect users to potentially harmful content, likely for financial gain or further malware delivery. No scripts were extracted, but the embedded URLs and the nature of the lures strongly indicate a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-scams-game-hack In PDF document text
    • https://wenshan.com.tw/upload/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/no-robux_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/robux-online_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/coin-master-free-spins-hack-without-human-verification_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_off000048c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48C4 25916 bytes
SHA-256: 92b0bcea77ac193f6591b55b0b7f533b2f3659e456e013419441e8489a17ac0d
font_01_sfnt_off0000834b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x834B 18500 bytes
SHA-256: f6eebadb3de4af7ab0205057cc55fc1daf9397692da1370c2a19d2d749ad11f1

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