Malicious PDF — malware analysis report

Static analysis result for SHA-256 f70ce585c501f0dd…

MALICIOUS

PDF

34.6 KB Created: 2021-06-19 03:25:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: dcdf22e1885446cd1f3a457eacca478a SHA-1: 8b588b1d92215ecffa32d05107ca58e72817c560 SHA-256: f70ce585c501f0ddd5d2566849f5a2b334b3e2788b11c23c9780944c71399ab2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, including one identified as a malicious redirector, which is designed to lure users into clicking on links promising free game items or hacks. The document body explicitly mentions "How To Get Free Limiteds On Roblox 2021" and "CLICK HERE TO ACCESS ROBUX GENERATOR", reinforcing the phishing lure. While no scripts were explicitly extracted, the nature of the embedded URLs and the lure suggests a phishing or scam attempt, likely leading to a malicious download or further 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.co/app/431946152/how-to-get-free-limiteds-on-roblox-2021-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/robux-for-free-no-robot_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-roblox-atravesar-paredes_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-hack-robux-and-tix-cheat-tool-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/my-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/tiktok-free-online-textbooks_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-robux-hack-without-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-and-obcxdaniel_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-in-the-game_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-game-plus-com-coin-master_GM406889139.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_off00002f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F41 21940 bytes
SHA-256: 16353f267df9b2373c3755dfec7d38f4d4a3a121f84ddd6f95da503f12941a7c
font_01_sfnt_off00005f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8F 19876 bytes
SHA-256: 3f551c1f82abdc61af97d595ea9028f23738aa515904e6ad211e1af944698783

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