Malicious PDF — malware analysis report

Static analysis result for SHA-256 58fb8a9cf30b7c7e…

MALICIOUS

PDF

43.5 KB Created: 2021-05-16 01:56:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a2055143b70b50167b91519fc3fe17ed SHA-1: f3e7731ef54c28ea38b2a495764f6dae7667d959 SHA-256: 58fb8a9cf30b7c7ed0c1197465c66bd45eaf6eecfa7ef69284af26ee61f277ca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks'. The ML classifier strongly flagged this PDF as malicious. The document body and embedded links suggest a social engineering lure to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/479516143/do-you-get-windows-10-minecraft-for-free-with-java-game-hack In PDF document text
    • http://www.hlad.hr/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-gift-card-online-free_GM431946152.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
font_00_sfnt_off00004a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A72 25216 bytes
SHA-256: ccc2156cc1b77316e1bdc45b3882b3a345bb5b1f5836757a30fb803b4eb67838
font_01_sfnt_off00008410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8410 19440 bytes
SHA-256: 4f6116c3ae1f04b8b6121a0b0d1b9b447449cf69c412c2009f2ae6d1f9a529b7

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