Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e1e802ef45aa8ab…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 22:20:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 050d55e2884b88abfcdd3da6d910d021 SHA-1: ab342329750c51824f0c94cdd35d1fa5892e3131 SHA-256: 2e1e802ef45aa8aba612a734ab98b7f196f6e487d305cb2d932b5e213fd1550e
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 0.9865

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/coin-master-free-items-game-hack PDF link annotation
    • http://lib-smansumsel.sch.id/repository/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-download_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/kuso-icu-roblox-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
stream_004_off0000517e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x517E 24616 bytes
SHA-256: e3e86aff13a5bbb7b379db3dc788617541476393cf827bf68b4af9a32fbe6065
font_01_sfnt_off000089a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A9 17968 bytes
SHA-256: 573beccbb9385faa7d237b72ffee946266096df963b3eebf5a3a94db09fd0704

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