Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb9c76f131017e9…

MALICIOUS

PDF

35.1 KB Created: 2021-06-28 02:24:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f6f27c73fb613c8329d9542e27ee58db SHA-1: 78a95618b76dc48d2752cff98462e6760eac90ad SHA-256: afb9c76f131017e93c816504dd451ac65619b26f3ad9fc269a2f6384503adbcb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirector infrastructure, specifically advertising free game currency generators and hacks. The primary malicious URL identified is http://netcdn.co/app/431946152/free-robux-code-generator-roblox-free-robux-generator-game-hack. The document body and heuristics indicate a lure for users interested in obtaining in-game items, which is a common social engineering tactic to drive traffic to malicious sites.

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/free-robux-code-generator-roblox-free-robux-generator-game-hack In PDF document text
    • http://www.perpusffup.or.id/repository/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/client-minecraft_GM479516143.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/robux-today_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/robux-premium_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/robux-hack-me_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_off00003222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3222 22336 bytes
SHA-256: c66ffe31f49a19b968be3b7a6a8be6ce8d5fd1426a73495cd22ebe43bb5e1e81
font_01_sfnt_off000063e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E1 19104 bytes
SHA-256: 5a14b83d3ecd8c995af5db1439c334f90b85e8941e80563e17f0b60707562509