Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd051b52408b8567…

MALICIOUS

PDF

35.6 KB Created: 2021-06-19 21:13:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f7e72398455b0ace0185b31bd3c89f4c SHA-1: 0bd8cb8c15869cf6cc92300cdaf4227cad4c6a93 SHA-256: dd051b52408b85672131f0f9a717468e67f894a7ccbca7aafcf243c6bd701bff
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and websites offering 'free game hacks' and currency, indicating a lure for users to click through. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a visual download button lure further support a malicious intent. The primary goal appears to be redirecting users to potentially harmful 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/roblox-marketplace-free-game-hack In PDF document text
    • http://fkunismuh.org/perpustakaan/repository/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/breaking-free-roblox-id_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-hack-script-vehicle-simulator-infinite-money-script-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-roblox-followers_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/pubg-uc-new-freepik_GM1330123889.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-rare-hats-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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_off00003206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3206 22796 bytes
SHA-256: 7e5fa77a78283b5ebe6dbb461d25aeca9a67f6150a9de1de741e32a6148cab7c
font_01_sfnt_off00006558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6558 19296 bytes
SHA-256: 2603b895d9ec2f7ea2700d3be8bb2082cd454f2e8a6461c686ac81fbf10a068c

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