Malicious PDF — malware analysis report

Static analysis result for SHA-256 0753874e1208a87a…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 22:13:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 580a9bda81c78b6d8f2859f95f507f70 SHA-1: c2109cd0ed856264509aa074bc40a7755473aa3f SHA-256: 0753874e1208a87a9ee331961c50342e7414034482abd61688369300e4f6008a
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/master-coin-free-spin-game-hack PDF link annotation
    • http://lib.mappifhui.org/repository/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/hack-para-jailbreak-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-hack-anyones-account-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-for-playing-games_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-robux-web_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-jailbreak-hack-mod-menu_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-do-you-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/hacks-for-blood-flow-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-roblox-pins_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-exploit-download-2021-free_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-spin-wheel_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-today-youtube_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-face-roblox-girl_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/get-free-cards-coin-master_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_off00003001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3001 22716 bytes
SHA-256: 5e10935e99c86161a8ac62c04c2e6d03d52108fdc5ab3fac377a1003ab66f90b
font_01_sfnt_off000062e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E2 18176 bytes
SHA-256: e7ebdb51c22119da7989f291c4e1e79e43f48b2212e10ddb7071af0af135db83