Malicious PDF — malware analysis report

Static analysis result for SHA-256 558951ff5bd578da…

MALICIOUS

PDF

34.7 KB Created: 2021-06-27 17:22:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f90ad461905fecf3c0571e9dbc7e343b SHA-1: 46104cc0414c5b875bd5e6e3907f8b4f708f3990 SHA-256: 558951ff5bd578da9842da0ebac76cf23923def9f8eeda105aebc226a5956458
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is designed as a lure, presenting itself as a 'game hack' or generator to entice users. It contains numerous links, including a primary malicious redirector at http://netcdn.co/app/431946152/how-to-fly-hack-in-roblox-2021-game-hack, which likely leads to further malicious content or downloads. The document's structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.co/app/431946152/how-to-fly-hack-in-roblox-2021-game-hack In PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/pubg-90-uc_GM1330123889.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/coin-master-game-hack-app-download_GM406889139.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/roblox-lumber-tycoon-2-hack-glitch_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/free-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/how-to-get-free-ninja-animation-roblox_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/how-do-you-get-free-robux-2021_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_off00002e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E58 22656 bytes
SHA-256: 1da6f5f9acd66436ec6735bee0b1a98354e095e1ba1d4580f649e2ea6fb0c869
font_01_sfnt_off00006119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6119 19568 bytes
SHA-256: 4f7f68f693b60ba2e17b5455123240edb14c9ef94081e186be6739aaf90fa2f2

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