Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f151662fa1ef8c…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 14:43:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 453b25d3b7b46783f466a9484132f9b5 SHA-1: e26265bd8f1443dbb2bab2e21a550d6e8b534e82 SHA-256: 89f151662fa1ef8c4658e97a6dc215b864961e86aa202b20ab677c6b275550ee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to 'free Robux' or game hacks, containing multiple links to a known malicious redirector. The primary malicious URL identified is http://netcdn.tw/app/431946152/get-free-robux-com-game-hack. The document's structure and embedded links suggest it is designed to lead users to potentially harmful websites, likely for credential harvesting or further malware delivery.

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.tw/app/431946152/get-free-robux-com-game-hack In PDF document text
    • https://www.croatia-flyfishing.com/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/rake-roblox-health-bar-hack_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/how-to-reveal-your-hacked-accounts-password-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/free-robux-cheats-2021_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/free-roblox-printables_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/coin-master-free-spins-2021-app_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_off00002e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E77 22088 bytes
SHA-256: 2975c3920593ae1fdc719cb093b9470502f52b27112de8b4a598ec4553b15a2e
font_01_sfnt_off00005f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F35 19080 bytes
SHA-256: bd48df5b3587c62f460ac4547970d78652d76b982da8f06603591dccd4bca80f

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