Malicious PDF — malware analysis report

Static analysis result for SHA-256 589c38c0c582e8ba…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 11:21:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 41380b1553690b92363b8373c5a44297 SHA-1: 359c8e7c726a7421ad140752af4d35fdb80c3096 SHA-256: 589c38c0c582e8ba816be0fb9e7c021bbd916678789f47e68e671b4a74748e74
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors, disguised as 'free generators' or 'game hacks' for popular games. The document body and embedded URLs strongly suggest a lure to trick users into visiting these sites, likely to download further malware or engage in scams. No scripts were extracted from this sample.

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/coin-master-free-spin-group-game-hack In PDF document text
    • http://cleansui.com.tw/image/data/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/medieval-hood-roblox-free_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/roblox-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/fart-attack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/bypassed-roblox-t-shirts-free_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/can-you-hack-on-roblox-on-xbox-one_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/code-to-access-a-game-that-gives-90m-robux-free_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-robux-today_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
font_00_sfnt_off00002f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F70 22504 bytes
SHA-256: 51efde17f28a8fd86a11ccd65a40d11ff6b4d1deca7a06f3dadf09a320f192c1
font_01_sfnt_off00006191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6191 18312 bytes
SHA-256: 450042c4f8d408e8d8484b2d9e1e439f1c658d0a6330ca9cb9236370181326bd

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