Malicious PDF — malware analysis report

Static analysis result for SHA-256 405335c2b67d57b4…

MALICIOUS

PDF

35.2 KB Created: 2021-06-19 08:52:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9caa0b0d5a7fbddae39ab882c679ab0e SHA-1: aa91af2687c6fecc11b398d96dbb632c7bdf2255 SHA-256: 405335c2b67d57b419ef791ab35d3b46c6a28d4e2732f4db43bca006ecc29865
160 Risk Score

Malware Insights

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

This PDF document employs a lure related to game hacks and free generators, directing users to a malicious redirector. The presence of multiple embedded URLs and the critical heuristic firings for malicious redirectors strongly indicate a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to exploit user interest in free in-game items to lead them to potentially harmful content.

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/atticus129-roblox-hacked-image-robloz-game-hack In PDF document text
    • http://pustaka.fti.unand.ac.id/repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/synapse-free-download-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/como-hackear-roblox-robux-gratis-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-admin-logo-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-unlimited-spin-link_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_off0000307c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307C 22236 bytes
SHA-256: d4d879380685c9eaf73a9d3e099f6abb99d7862da56b05dabf933536e58b3430
font_01_sfnt_off000061d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D3 19928 bytes
SHA-256: 95d502250e6e11f65d6269ee2a98d9d1f228173e840b0d02eb733dad9f116285

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