Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d00dc3f055602e8…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 10:51:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 848e9c18cded319751b717462152e8e5 SHA-1: 51b7a2ef129854e2f7b4a14909c03f1c2c486d52 SHA-256: 0d00dc3f055602e83942a9c66e30aa4ad073475c2d462f4b02a453509dd556e8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector hosted on 'netcdn.tw', which is flagged as malicious infrastructure and associated with game hack lures. The document body and heuristics indicate a social engineering attempt to trick users into clicking this link, likely leading to a further malicious download or exploit. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.tw/app/479516143/minecraft-svg-free-game-hack In PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-dragon-ball-rage-stats-hack-site-v3rmillionnet_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-walk-through-walls-hack-cc_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-phantom-forces-free-weapons_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/robux-giver-for-free_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/websites-for-robux_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-straight-away_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/get-free-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/hack-tool-for-roblox-pc_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/synapse-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-videos_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-synapse-roblox-exploit_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-just-enter-your-username_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-cheat-speed-run-4_GM431946152.pdfIn 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
font_00_sfnt_off00003198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3198 22964 bytes
SHA-256: 65ef5339843beb3bd6a55b287ea7755557fa0694b93a42203367c9f1bf369fc3
font_01_sfnt_off000064f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F6 17968 bytes
SHA-256: f82c060a5662ddcca675aec0cfac04b32032cde6baf3a8524f802f6fcb7e6d40

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