Malicious PDF — malware analysis report

Static analysis result for SHA-256 a52585a428567d2f…

MALICIOUS

PDF

35.7 KB Created: 2021-07-05 01:52:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d70ed232a657f88b9a25cba4d17de710 SHA-1: a82b79e8f2345b54d34213af1a15ba87f26735a5 SHA-256: a52585a428567d2fb2ffb67a293ae10aabee677a7aac9e651b7078b0e26a5390
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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-links-for-free-spins-2021-game-hack PDF link annotation
    • http://studio-dentistico-fiume.com/files/roblox-detectec-cheat_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/dragon-ball-x-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/roblox-royale-high-hack-club_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/roblox-jump-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-hat-codes-roblox_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/roblox-boys-pajamas-free-shipping_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/roblox-hack-bad-behaviour-solve_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/when-did-people-get-a-free-business-cat-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000323d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x323D 23536 bytes
SHA-256: 1b0f7d4fb8ae18c642a8f8fc3379d91c47e4ca239570e066fa89c056cc1bb5cc
font_01_sfnt_off00006783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6783 18748 bytes
SHA-256: 8d119a4c648bdbcdb702e6b2637ce89b675d402599e3c746c9fba888505a2c80

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