Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba20208d7f96c8e…

MALICIOUS

PDF

34.9 KB Created: 2021-07-08 05:49:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c0abee50a71f35d90b9d8ec84649b768 SHA-1: 14a23dcfe963d5aaffec20be769737d2e863e68d SHA-256: 1ba20208d7f96c8ea8e91041bf4d0912397d1180339e3ad8649a9820369d6615
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "game hacks" and "free spins" lures. The primary link, http://netcdn.tw/app/406889139/get-free-spins-in-coin-master-game-hack, is flagged as malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at driving users to potentially malicious websites. The ML classifier also flagged this document with high confidence.

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/get-free-spins-in-coin-master-game-hack In PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-work-at-a-pizza-place-money-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-super-mega-hack_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-hack-ulimited-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/hacks-para-roblox-booga-booga-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-polo-ralph-lauren-free_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-restaurant-tycoon-free_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/new-roblox-exploit-hack_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_off000032a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32A5 22888 bytes
SHA-256: e7d74dd9c9072be3d871f111b11b2351ba07b1254c95c718f8368db69e61d7aa
font_01_sfnt_off00006607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6607 18176 bytes
SHA-256: 40bd2a423e8c3e22f2455c3bf096c64e087039c583c2df40abec99adf6858c95

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