Malicious PDF — malware analysis report

Static analysis result for SHA-256 af4f314f2860af10…

MALICIOUS

PDF

35.2 KB Created: 2021-06-18 13:04:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a106c1771603b5b2b56560cc08263d57 SHA-1: 4c325d7d7d41b58a3a7515a0ae54767fac6511b5 SHA-256: af4f314f2860af10b8de1ee34bb7fc6135476f19bec0d4e0cfe2342b3cab859b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures for game hacks and cheats. The document body explicitly mentions 'Download Cheat Roblox Jailbreak' and includes a URL pointing to a download page, reinforcing the phishing attempt. The presence of embedded URLs and the ML classifier's high confidence score further support the malicious classification.

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/download-cheat-roblox-jailbreak-game-hack In PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-shirt-creator-free-shipping_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/hacks-para-roblox-mad-city_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-creeper-chaos-hack_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-legit-hack-into-somebodies-roblox-account_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-get-free-roblox-with-ihax-games_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/get-robux-today_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/apk-roblox-free-robux_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_off00003215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3215 21928 bytes
SHA-256: 0b8f6c0b600b80a31ff8d48623c0fde372460fa2996bca24e7da7a6e8182affe
font_01_sfnt_off000062a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A2 19716 bytes
SHA-256: 19c980d169c5069b1810cf80c68c3e34f5c9e023249f351220a5f3dae931af33

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