Malicious PDF — malware analysis report

Static analysis result for SHA-256 6786adaf3e37b06a…

MALICIOUS

PDF

48.1 KB Created: 2021-05-13 05:32:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b853f9ccce5dd4ef463ab35c7e5f74e9 SHA-1: f51e735c16c9a4f2717ad0fc91ad96d864b4bb54 SHA-256: 6786adaf3e37b06a8e126e0eb86728b77e98a447fade100ff66fbab8f906868b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, specifically targeting users interested in game hacks and free in-game currency like Robux and Coin Master spins. The heuristic firings confirm these links lead to known malicious infrastructure and are designed as lures. Although no scripts were explicitly extracted, the nature of the embedded links and the document body content suggests a phishing attempt to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/roblox-hack-com-game-hack In PDF document text
    • http://easytransferbrazil.com/images/roblox-data-breach_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-robux-co_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-800-robux_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004baf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BAF 29152 bytes
SHA-256: 48dc489a2da5013d1f07561f8f0f3094fd454bc8da67f68e1292a97e04de56a9
font_01_sfnt_off00008f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F1E 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off0000991a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x991A 18440 bytes
SHA-256: 92e56247950081f5f8ea935637ec6d93dafa31aa334148af106ab9a8365bd2e0

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