Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb0f4e53d428695…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 02:11:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 51d9dc4edd190518e97cff441bc1915e SHA-1: 5e0dc882f7823e8f4c981616a78900aad103173b SHA-256: 9fb0f4e53d4286955cef077dc521b6cf6acac68b33cd89d42e4a2e13ceee15cd
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appear to be game hacks or generators. The primary link, http://netcdn.tw/app/406889139/google-coin-master-free-spins-game-hack, is identified as a malicious redirector. The document body and numerous extracted URLs suggest a campaign focused on distributing potentially unwanted software or engaging in phishing related to popular games and services.

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/google-coin-master-free-spins-game-hack In PDF document text
    • https://jinghuaeye.com.tw/upload/files/juego-hackeado-de-coin-master_GM406889139.pdfIn PDF document text
    • https://jinghuaeye.com.tw/upload/files/i-need-robux_GM431946152.pdfIn PDF document text
    • https://jinghuaeye.com.tw/upload/files/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • https://jinghuaeye.com.tw/upload/files/how-to-hack-roblox-treasure-hunt-simulator-get-rebirth_GM431946152.pdfIn PDF document text
    • https://jinghuaeye.com.tw/upload/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • https://jinghuaeye.com.tw/upload/files/how-to-make-a-roblox-hack-in-2021_GM431946152.pdfIn PDF document text
    • https://jinghuaeye.com.tw/upload/files/free-roblox-promo-codes-2021-november_GM431946152.pdfIn PDF document text
    • https://jinghuaeye.com.tw/upload/files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • https://jinghuaeye.com.tw/upload/files/free-tiktok-followers-no-survey_GM835599320.pdfIn PDF document text
    • https://jinghuaeye.com.tw/upload/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://jinghuaeye.com.tw/upload/files/free-robux-glitch_GM431946152.pdfIn PDF document text
    • https://jinghuaeye.com.tw/upload/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://jinghuaeye.com.tw/upload/files/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • https://jinghuaeye.com.tw/upload/files/dracosword-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://jinghuaeye.com.tw/upload/files/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • https://jinghuaeye.com.tw/upload/files/roblox-giveawayxzy-online-hack_GM431946152.pdfIn PDF document text
    • https://jinghuaeye.com.tw/upload/files/free-robux-by-agarminer_GM431946152.pdfIn PDF document text
    • https://jinghuaeye.com.tw/upload/files/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://jinghuaeye.com.tw/upload/files/coin-master-level-4_GM406889139.pdfIn PDF document text
    • https://jinghuaeye.com.tw/upload/files/roblox-dayz-battlegrounds-cheat-codes_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_off000031d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31D3 22676 bytes
SHA-256: f32eb78a71bda75396cbdc724c48804954f4af8f9ad0aa63edb249b7dc74772e
font_01_sfnt_off00006472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6472 18248 bytes
SHA-256: 030bed7090460e4d71b0ce795308f81d11b161da8a2958b6b82163bc1faa59de

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