Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd4080e1af99802…

MALICIOUS

PDF

42.4 KB Created: 2021-05-14 22:28:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 03e58d6dceab06593e246fbc4567006e SHA-1: 5036919e0ca4980604d04af2e72c09c5b0b0062a SHA-256: edd4080e1af99802bb3709c81fec33314bf0031b3568e7d0dc9c915532ee3cf8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 0.9971

Heuristics 4

  • 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.xyz/app/406889139/coin-master-fan-page-facebook-game-hack PDF link annotation
    • http://linens.kiev.ua/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/how-can-i-get-robux_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://linens.kiev.ua/images/113-hacked-client_GM479516143.pdfIn PDF document text
    • http://linens.kiev.ua/images/minecraft-hacked-client_GM479516143.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_003_off00004928.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4928 25412 bytes
SHA-256: 0ad7563eb8fd933b7111d1e3d47219f51e84e37d13fc6467e1906b7b0d88eec5
font_01_sfnt_off000082ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82EE 18480 bytes
SHA-256: 7e98bf0f6338502fb01f3af9c52c47c2620284ff0dbc63191457d71ad3561db6

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