Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3551b746f0a1c65…

MALICIOUS

PDF

43.5 KB Created: 2021-05-16 08:48:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 07b1ea0d17ce65cafde82ce2b00ab710 SHA-1: 98a6f549607e90b2fab3fb6bd594530af3278792 SHA-256: a3551b746f0a1c65c3d4113df2d34f76238f1917ccb9bdd3a7b4f43990bdcc57
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising 'free generator / game hack' content. The document body and embedded URLs reinforce this lure, directing users to potentially malicious sites. The presence of a clipboard command lure suggests an attempt to trick users into executing commands, likely to download and run further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/free-private-minecraft-server-game-hack In PDF document text
    • http://kontaktadig.se/images/coin-master-free-spins-without-verification_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://kontaktadig.se/images/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/roblox-ftw_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/free-spins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • https://education.minecraftIn 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_off00004db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DB3 27076 bytes
SHA-256: 0f99272f14c054dc3b95c7cce3f0f9c9f86b2b9aebd59f358f790152e347c638
font_01_sfnt_off00008921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8921 17836 bytes
SHA-256: 7ff77ee3a78605da9ef85fec4605ea670974ab48e4ca839a7389016eb6bc2a09

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