Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f7290f5424a6745…

MALICIOUS

PDF

33.7 KB Created: 2021-06-28 02:06:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1cbb75bf8d36d89bb08620b318622be4 SHA-1: cfc61ff62a3221920519fccf304fd5ef1eb4e825 SHA-256: 5f7290f5424a67458ffda32ecc2f439dbcd0a9a067ca6c303b03153e6f4c1c2b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirectors, specifically advertising free items for games like Roblox and Coin Master. The ML classifier strongly flagged this PDF as malicious, and the presence of these lures indicates a phishing or scam attempt. No scripts were extracted, but the document's structure and embedded links suggest it is designed to redirect users to potentially harmful websites.

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/roblox-free-memverships-game-hack In PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/1-million-robux-game-pass-free_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-war-tycoon-cheats_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-lua-script-snow-board-resort-hack_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-for-obby_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-hair-on-roblox-promo-code-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/robux-win_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/earn-free-robux-for-roblox-robloxwin_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-get-free-plus-on-roblox-meepcity-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-blogspot_GM406889139.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_off00002d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D0D 21752 bytes
SHA-256: 459165e5da2670f8f0f87a80456731feb66bb78e07fbda57ee0e44f0cc7eb39d
font_01_sfnt_off00005d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D26 19684 bytes
SHA-256: 2bca8ac65de29838329ce378af356dab3df1be96cecaa5c5c0a52a9d195fea6b

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