Malicious PDF — malware analysis report

Static analysis result for SHA-256 039f8615eade0e0d…

MALICIOUS

PDF

33.2 KB Created: 2021-06-28 12:07:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 51bf7c8efbc46499230ccf015df40207 SHA-1: 32a9463658c5f81bbf4e46d43d3f5418388dfd00 SHA-256: 039f8615eade0e0d9e7202b2b4cd7f90bbc9d307270cf0036162215921a80c28
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that are identified as malicious redirectors, specifically leading to a "free Robux generator" lure. The document body reinforces this by displaying similar scam-related text and URLs. The primary function appears to be directing users to potentially harmful websites, which is a common tactic for malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/how-to-get-free-robux-in-obby-game-hack In PDF document text
    • https://hekl-software.de/images/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • https://hekl-software.de/images/roblox-hack-be-other-players_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • https://hekl-software.de/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/script-executor-roblox-download-free-2021_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/roblox-how-to-hack-accounts-2021_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/coin-master-free-online_GM406889139.pdfIn PDF document text
    • https://hekl-software.de/images/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://hekl-software.de/images/roblox-c9m_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/free-roblox-water-bottle-labels_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • https://hekl-software.de/images/roblox-free-items-inspect-element_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/how-to-get-free-robux-no-virus_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/free-robux-june-2021_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/free-robux-videos_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/rbx-gg-free-robux_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_off00002a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A43 22552 bytes
SHA-256: 69f798e7aefdc495e7c983a8077829c8e76e00c79a51b2120bedc0f81a0dec0c
font_01_sfnt_off00005c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C91 19164 bytes
SHA-256: e874dfee553a46ec086a42da10c937a15a79e274f09a62fbe3ae98ca528ffbc4

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