Malicious PDF — malware analysis report

Static analysis result for SHA-256 635b0df09cf72c4d…

MALICIOUS

PDF

34.8 KB Created: 2021-06-27 13:42:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a237b50cdae295fefc81d1863049c865 SHA-1: 6fb326cacbc7ec948e7cbb3f85b41099cd48c4d4 SHA-256: 635b0df09cf72c4d925568a9af38b81b7d566773c998b64a2a61b2759871c98d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure, advertising 'free generators' or 'game hacks' to entice users into clicking malicious links. The primary link, http://netcdn.co/app/431946152/roblox-money-hack-download-game-hack, is identified as a malicious redirector. The document contains numerous other links to PDFs hosted on lib.smklabor.sch.id, suggesting a chain of malicious content delivery. No scripts were extracted, but the document's structure and embedded URLs strongly indicate 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/roblox-money-hack-download-game-hack In PDF document text
    • http://lib.smklabor.sch.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-cheat-engine-table-and-bypass-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/where-pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/counter-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/earn-free-robux-for-roblox-bux-city_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-stuff-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/any-roblox-game-pass-free-script_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-livestreams_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-do-i-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-roblox-lvl-7_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-how-to-get-free-robux-with-cheat-engine_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
font_00_sfnt_off00002f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F50 22464 bytes
SHA-256: 88c9919a2690d905409dcdce06040c9f2b1aa3098f69a16c24ba6e19c7771652
font_01_sfnt_off00006132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6132 19536 bytes
SHA-256: c9a3f345c80afb415b154af17d8141dc1d67421ff140119377f98e3ac176c1ba

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