Malicious PDF — malware analysis report

Static analysis result for SHA-256 723257c9782c7e79…

MALICIOUS

PDF

34.7 KB Created: 2021-07-02 05:21:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8c9f83251bebd9554cc5abef0e58b889 SHA-1: 09d10c84d55dedf0ad0adc1c64f2153c79c832ef SHA-256: 723257c9782c7e795a646223f7f43451fe463658e323e187a7de741b8e72a515
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector infrastructure, disguised as generators or hacks for popular games like Roblox and Minecraft. The document body explicitly mentions 'Get Free Stuff On Roblox Catalog' and includes the primary malicious URL. The presence of multiple redirector links and the ML classifier's high confidence score indicate a strong likelihood of malicious intent, likely to lead users to a phishing or malware download site.

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/get-free-stuff-on-roblox-catalog-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-jailbreak-free-money-generator_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-roblox-game-just-by-typing_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/avatar-the-last-airbender-roblox-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-nike-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-roblox-pc-download-no-clips_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-free-builders-club-2021-android_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-items-on-roblox-on-computer_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-free-rade_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-robux-in-roblox-script_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-do-u-get-robux-for-free-2021_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_off00003030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3030 22588 bytes
SHA-256: c9ae6c5a8fb1b087dfa8c67e2db7d3cdb98415794f3394a775a01c695cb0a484
font_01_sfnt_off000062c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C1 18896 bytes
SHA-256: b1a6fed004519b4609804269ae41c0ece05784bfff4f0a220e89f4a4a1357153

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