Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfaf820eba48162b…

MALICIOUS

PDF

35.6 KB Created: 2021-07-05 15:28:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6a66a2ab6591bc70c22e560dcc70b620 SHA-1: 3944c20c3c56be4fc3b8bd118eff207149de0a86 SHA-256: dfaf820eba48162bef1d36f5a6a5e67a91a2fc20c82ced6135490351f1a84bfa
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and other PDF files, masquerading as game hacks and generators. The primary URL http://netcdn.tw/app/406889139/coin-master-free-spins-hack-download-game-hack is identified as a malicious redirector. The document body and heuristics indicate a lure for free game currency or hacks, likely to lead users to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/coin-master-free-spins-hack-download-game-hack In PDF document text
    • https://sunnygarden.com.tw/image/data/files/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-robux-generator-fake_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/pubg-uc-website-free_GM1330123889.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-hack-into-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/roblox-for-free-no-signing-up-geust_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/grifffin-hat-gives-free-robux_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-hack-blog_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_off000033be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33BE 22760 bytes
SHA-256: 46a98cd56f14f43dc007b195607417cc9e20eff7b7d02a24da6d8ad309354de6
font_01_sfnt_off0000669e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669E 18924 bytes
SHA-256: b115cb4344aa47f0303d2ed9022e82a2adfaa93bb3eed7c5085ede476eb5356d

Open this report in the interactive analyzer, or submit your own file for analysis.