Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d19abf6f858e816…

MALICIOUS

PDF

34.8 KB Created: 2021-07-07 16:27:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0bba0d18e4ad4a934e12105e107beac9 SHA-1: 72aa9c9059aaf49318220f6b5b4a90ec91035beb SHA-256: 0d19abf6f858e816a79379744268290e3acb01b4011d3586fe00442890c812d3
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 document body and heuristics indicate a lure for users interested in game cheats or virtual currency, likely leading to a phishing site or malware download. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a malicious workflow initiated by user interaction.

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/406889139/how-to-get-free-coins-in-coin-master-game-game-hack In PDF document text
    • https://dentmate.com.tw/image/data/files/static-moonactive-net_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-avatar-customize-free_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-hack-tool-download-no-survey_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/minecraft-images-free_GM479516143.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-roblox-wallpaper_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-robux-and-tickets-generator-2021-no-survey-no-download_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/como-instalar-hacks-de-roblox-en-anime-ultimate_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-free-muscle-shirt_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/script-lua-hack-roblox_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-copy-right-free-codes_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-robux-group-payouts-2021_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-robux-service_GM431946152.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_002_off00003197.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3197 23012 bytes
SHA-256: d885bb45e5bab620619b2d30673577d9941ead426a8ff221e1385518346dcb3f
font_01_sfnt_off00006535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6535 18420 bytes
SHA-256: 2d9447480b9e6b84fb585e3b568d723d862a2a90c2fba975df7521df3b865f7c

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