Malicious PDF — malware analysis report

Static analysis result for SHA-256 53da9316adcfdaf3…

MALICIOUS

PDF

48.1 KB Created: 2021-06-03 05:48:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fda82520b7a008192d90ed2c20cb998d SHA-1: 13f6fc44f6a61b6c3c6e43e5027d7ee117ded46d SHA-256: 53da9316adcfdaf3a6d2c44650c38d592b165b3ba8e8c5b0b34d8aca58bc79da
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 0.9796

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 https://netcdn.online/app/406889139/moon-active-games-game-hack PDF link annotation
    • http://librarysenior.com/repository/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-play-online-free_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/robux-now_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/pokemon-go-free-candy_GM1094591345.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f1f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F1F 28520 bytes
SHA-256: 0e4a9db57a413aa82e030c3069c12f2ba021956ead8363e581c8d40767b89b23
font_01_sfnt_off00009010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9010 2912 bytes
SHA-256: 5148acdd32fd2fb53aa7f5f4f2cc5d68451183b3efb66825c1523dade8cc57ff
font_02_sfnt_off00009a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A1E 17920 bytes
SHA-256: 6572202fb11b79787028deba1beb076b209f1779d589edab2c04e97f197d6ee2

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