Malicious PDF — malware analysis report

Static analysis result for SHA-256 4863878c7320664f…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 11:43:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 05ebddd8f6e40cddae86e37906933d3c SHA-1: 6af360e15fef8bb1abb14e778b2770c6d98845db SHA-256: 4863878c7320664f21bfed9bde4cdd037bd2758f99083bd5e0d8a607c45b3e26
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs that redirect to a known malicious infrastructure, likely serving as a lure for game hacks and cheats. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links indicates an attempt to download or redirect the user to a malicious payload. No scripts were extracted, but the document's structure and embedded links 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.tw/app/431946152/roblox-apk-hack-game-hack In PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-promo-codes-no-inspect_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-vtool-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-death-sound-free-download_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-unredemeed-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/minecraft-114-download_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-radio-obby-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-a-private-server-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-trade-bot_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-download-hacks-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-extreme-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/game-pass-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/rbx-free_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/hacks-in-thessaloniki-international-airport-roblox-air-attica_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-everything-in-roblox-catalog-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/robux-free-apk_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E4F 22284 bytes
SHA-256: d572538146f33011940d898978de2a09dccece554d497ab047b557565445ec17
font_01_sfnt_off00005fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE3 18832 bytes
SHA-256: 4a54e3c0999d22341ed87b7a4ab614cdfd6f3715e6a9eb51b324e9e7408846b1

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