Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7b7ebd9eca2963…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 23:44:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 68c0863efe38b8a11bf10e6d0e1f500b SHA-1: ac5397019be3481e724fbe7896eed03ca4a09c6e SHA-256: ed7b7ebd9eca296391decbbeb5d2d096370941cb2f4b52e045b8d348ab774018
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The document body and heuristics indicate a lure for 'free generators' or 'game hacks', aiming to trick users into visiting the malicious URL. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or scam attempt.

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/431946152/google-how-do-you-get-free-robux-game-hack In PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-free-robux-on-roblox-without-buying-anything_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/demon-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/offers-for-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/meep-city-free-plus-hack-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-hack-download-no-survey-no-verification_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-army-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-spin-gratis-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_off00003099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3099 21980 bytes
SHA-256: 5c1c81c2aa37f460ed3f8e68547371e698adf8c8834bab2d68208e072f940cf7
font_01_sfnt_off00006106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6106 19388 bytes
SHA-256: e0d82c167f6ca64f121b23a1748ead6b70296300b19a9978e36a20c70c2cac67

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