Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e270ee140ac523…

MALICIOUS

PDF

35.9 KB Created: 2021-06-30 05:55:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a5c487b228011e3ae8eacb992448b3a8 SHA-1: 397c4b1169f6915268c0366ef2518980e327a6d8 SHA-256: 38e270ee140ac523739d22d2dfeb9a654ae8ee2f3a51a568082f26b658281bbd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a 'free generator / game hack' which redirects to malicious infrastructure. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites. No scripts were extracted from this sample, but the presence of malicious redirector links and the ML classifier output strongly indicate malicious intent.

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.co/app/431946152/hacks-for-the-mad-games-roblox-game-hack In PDF document text
    • https://jdclassicautoparts.com/image/data/files/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/how-to-get-any-package-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/real-free-robux-games_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/free-appstore-codes-for-roblox-robux_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/master-free-spin_GM406889139.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/how-can-i-get-minecraft-for-free_GM479516143.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_off00003455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3455 22372 bytes
SHA-256: b5ea023418d1c7f095294d09aa541723d4b239fa91c042b3c3e90eec67b3a769
font_01_sfnt_off000065e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E5 19616 bytes
SHA-256: 027d585be90e5a83e052b763cb48ed66452ac1f0537db8bdbe34e8e921592240

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