Malicious PDF — malware analysis report

Static analysis result for SHA-256 807ad83e93527d0b…

MALICIOUS

PDF

33.5 KB Created: 2021-07-05 12:21:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ca59bb46490c1d2d38a44aa339251e13 SHA-1: a790a2f78e235330d55fe6cd5541b6025566430c SHA-256: 807ad83e93527d0b7f400731ccc4332d3c692152a4edb9672da569d4567fcf42
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting a 'game hack' or 'free generator' lure. The presence of a visual download button and the overall theme suggest a phishing or scam attempt designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/instantrobux-game-hack In PDF document text
    • http://lib.mbp.ac.id/repository/gaming-tutorials-com-robux-cheat_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/crazy-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/robux-place-rewards_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-free-robux-no-hack-or_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/games-for-free-like-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/rape-simulator_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/roblox-treasure-hunt-simulator-cheats_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/pubg-uc-redeem-code-generator_GM1330123889.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/minecraft-free_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-spins-coin-master-2021-glitch_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_off00002c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C74 22424 bytes
SHA-256: 5cc938e7b7a61b3506f922fc890e27933286c8db0f3a45f1b3c4fd9549961501
font_01_sfnt_off00005e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9B 18656 bytes
SHA-256: 5a13a4ba7d4aa3ba564163d7fd1f4e40de414e0c8b16d10ac9018e4301010f0d