Malicious PDF — malware analysis report

Static analysis result for SHA-256 390baeec44bcbf92…

MALICIOUS

PDF

34.4 KB Created: 2021-06-29 20:14:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bf9b374200f44f2b7913bc7e9886d7ac SHA-1: be314aee1e29b006e9862594cb23159f64843748 SHA-256: 390baeec44bcbf92741c505b216d7887b73a992415e1525f8f3aad0ff340d127
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirectors and potentially malicious domains, masquerading as generators for free game currency or hacks. The heuristic firings indicate that these links are associated with malicious redirector infrastructure and game hack lures. While no scripts were explicitly extracted, the document's structure and embedded URLs strongly suggest a phishing or malware distribution 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.co/app/431946152/mistplay-com-free-robux-game-hack In PDF document text
    • http://lib.fisipumt.ac.id/repository/snapse-hack-roblox-2021-anti-ban_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/telecharger-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-hack-2021-may_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-generator-download-no-surveys_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/indigojoe-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-laser-tanks-20-cheats_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-auto-clicker-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-play-for-free-login_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-wings-for-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-posed-golden-freddy-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-hack-robux-2021-no-download_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/apocalypse-rising-roblox-hack-25-fvrier-2021_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_off00002dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DFF 22164 bytes
SHA-256: 0a57805fbc6bef287e3ff35fa7e015d23447f0eaedb9add32b197a49c1512c41
font_01_sfnt_off00005f21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F21 19824 bytes
SHA-256: 39a846f08b6f4d3ff9970bba274bb7b2c219841506e5783fd97fde977ad36449