Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9355912096d6e3c…

MALICIOUS

PDF

43.4 KB Created: 2021-06-03 10:05:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 84dcf72f2054d6d187882d6cb8d7aa9a SHA-1: aaa02916b624cb8873aeb350e75014642ad673db SHA-256: c9355912096d6e3cf741515d1893359e236e7dc7812bc7fb8822b64b1daf0905
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URLs strongly indicate a social engineering lure designed to redirect users to potentially harmful content or further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/479516143/free-modded-minecraft-server-game-hack In PDF document text
    • https://www.yantan.com.tw/upload/files/coins-master_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-robux_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-robux-meme_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://www.freenom.comHeyIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f95.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F95 24880 bytes
SHA-256: fa3807fafa2a836b6916224e70a8070289c2a8247416151a2b1a07ece0b2dc33
font_01_sfnt_off000087fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87FA 18000 bytes
SHA-256: 088756902f929cbb0d1c0fa5d7f6f3d7dd891fd3cb3329064cb278e0751f8302

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