Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0710ab7ac8c3c8…

MALICIOUS

PDF

46.5 KB Created: 2021-05-14 12:08:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 1be5f2bb342024a7b493a02914a0f3d4 SHA-1: 6f3b61162782f42dd7e5500c2c21d5fe0a1dc0a4 SHA-256: ee0710ab7ac8c3c8a762bcefb358fcf01946a7b035964ba4787524398d909ca0
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 0.8948

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/431946152/robux-premium-game-hack PDF link annotation
    • http://www.bestbist.com/assets/uploads/pages/files/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-coin-master-cards_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_003_off00004b8a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B8A 25952 bytes
SHA-256: 94a6cc627befc91ea52e7556f0116bfc3848f69e72a42e3cfdb2d3ae79ab98ca
font_01_sfnt_off0000870b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x870B 3464 bytes
SHA-256: 8e24205afdd13dcdea98f8150ef77dee4030e0e50a7c748783d1b4598e034a20
font_02_sfnt_off00009341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9341 18384 bytes
SHA-256: 177267aa0ce1c90065d8421ade4190e52cdc6c4cb76b2453afd409bcd911e8d4

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