Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae14b63193aa4b0d…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 11:55:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cffd434c5fd3d4151d6ab20758ff2aca SHA-1: 9b44de222cfec945154d8a5648366131ab4036b5 SHA-256: ae14b63193aa4b0d3103bc1d9585b96e0d6a3aeb7f4ea4ea3353da9dc14746d6
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, leading to a 'free Roblox generator' lure. This suggests the document's primary purpose is to trick users into visiting potentially harmful websites, likely for malware distribution or phishing. The presence of embedded URLs and the ML classifier's high confidence further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.tw/app/431946152/free-roblox-generator-game-hack In PDF document text
    • http://library.persadabunda.ac.id/repository/free-roblox-games-that-you-dont-have-to-sign-in_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/the-roblox-game-and-online-free_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/is-robux-free-for-today_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-hack-khol-admin-perm_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/wurst-commands_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/minecraft-that-you-can-play-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_off00002eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EEF 22276 bytes
SHA-256: af47aff6b419de6c17910dd679d2eba1906640b85fe55c13f41be71c4b63f986
font_01_sfnt_off00005ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF7 18752 bytes
SHA-256: 7a858cebcbb43583261fc6928f7757faac90e9e6cc2d406a534a148fe309e18e

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