Malicious PDF — malware analysis report

Static analysis result for SHA-256 58db7acf7bcab2d3…

MALICIOUS

PDF

44.5 KB Created: 2021-05-11 03:32:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9fdcd8e4081969a02d551361cb6a5aa0 SHA-1: 6cd094b527f883c86f1405d38a53e6e3d72c04ec SHA-256: 58db7acf7bcab2d3d650ac39cdfa6d7688de8120a1113af8944cf8ff4019c737
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free generators' to entice users. The primary lure URL is https://netcdn.xyz/app/431946152/how-to-get-robux-without-paying-game-hack, which is part of a larger infrastructure hosting numerous similar lures. The document body and embedded URLs suggest a phishing or scam campaign aiming to trick users into downloading further malicious 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 https://netcdn.xyz/app/431946152/how-to-get-robux-without-paying-game-hack In PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-robux-net_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master--hack_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-coins-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/wurst-commands_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c67.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C67 26008 bytes
SHA-256: 88eb3f536085e76d5649ea4299b7fe64def371e39557ed43dd8b281153244d37
font_01_sfnt_off0000880f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x880F 19452 bytes
SHA-256: f617277b03f9c5e21d6c79dcd1607af3478f90b0cb5df5fc079a11a568c69004

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