Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db0733adfba77cc…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 02:46:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 250db78f4b14c3154ec2534e62adfe66 SHA-1: 363e9334feec9a3e8bebf185c775f9fb87eb4eb8 SHA-256: 9db0733adfba77cc5e022bc7118b2359109e80a12367fbd7b23d9901daf1e567
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a 'free generator / game hack' lure, which directs to known malicious redirector infrastructure. This indicates a phishing attempt to trick users into visiting a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious.

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/406889139/free-spin-link-coin-master-today-game-hack In PDF document text
    • https://lib.unitri.ac.id/repository/robux-and-tix-no-hack_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/commen-hacker-booga-clasic-sur-roblox-pc_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/robux-codes_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/www-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-lua-course-free_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/como-hackear-roblox-con-lucky-patcher_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-cheats-for-name_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/mc-update_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/cheat-roblox-money-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/2021-free-robux-daily-com_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/cheat-codes-vhicule-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-gift-card-amazon_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/robux-generator-no-verification-needed_GM431946152.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
stream_002_off00003137.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3137 22572 bytes
SHA-256: b4d91b20f17742130d80c757dbeb7ccc2f8aa35ea28c4d862a6199c25403d3fc
font_01_sfnt_off000063d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D0 18696 bytes
SHA-256: 31881190b33b808cb817da8829c891faee4b93e4bfb09ae76d7fe90b75b9481b

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