Malicious PDF — malware analysis report

Static analysis result for SHA-256 09f774e9d1bd5a66…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 07:22:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1c09d25ec718672514fe27c6812c2dcb SHA-1: 9d363c2d1540b6f216ac6ea8aed61de15d63f373 SHA-256: 09f774e9d1bd5a66df51c56b22651a1abe68e6956d9bffb42d2a5ce015f6df60
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting game hacks and generators for popular games like Coin Master and Roblox. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button lure further supports a malicious intent to redirect users to potentially harmful content or downloads. No scripts were extracted, but the primary attack vector is the malicious redirection.

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.tw/app/406889139/coin-master-free-soins-game-hack In PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/roblox-lego-hacking_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/roblox-jailbrek-fly-cheat-egine_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/ropa-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/como-hackear-cuentas-de-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-roblox-swear-words_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/minecraft-cracked-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/robux-and-tix-no-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-2021_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
font_00_sfnt_off00003279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3279 22952 bytes
SHA-256: 202c7233471176c3b59a6eb155b49044d314aa67648319d3651bb6f536ed04c4
font_01_sfnt_off00006610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6610 17996 bytes
SHA-256: f4306de497449c0c0250de5deec7b8066a87c54091f9de3abe5accc399ec3ddb

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