Malicious PDF — malware analysis report

Static analysis result for SHA-256 321adb451802b245…

MALICIOUS

PDF

33.0 KB Created: 2021-06-19 11:34:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fa2d91552e5e067a89acf439823a0914 SHA-1: 784ca7f91e70fdbc274433fd2b61f38e6933cc45 SHA-256: 321adb451802b245ea5325e0c8d5a77d7c74cebe798a24916df6724a041a02f4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The document body explicitly prompts the user to "CLICK HERE TO ACCESS ROBUX GENERATOR", indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence.

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/roblox-shirt-creator-free-shipping-game-hack In PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-2021-unlimited-coins-for-kids_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-use-a-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/bandit-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-exclusive-virtual-item-codes-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-inappropriate-games_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_off00002a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A1D 22348 bytes
SHA-256: 155af8c16be89964c7d092b2e99180076fe6f45c1586b5e62fd59f2a66eafd4c
font_01_sfnt_off00005bc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC8 19216 bytes
SHA-256: ba7ee7785eeec2a58840e613375793f3ed55713c2a2e3a307de0e75ecf71d11e

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