Malicious PDF — malware analysis report

Static analysis result for SHA-256 42fa06a15fdea2bb…

MALICIOUS

PDF

31.9 KB Created: 2021-07-20 05:04:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6594336fb676361a1f9ca1b85cd37ad6 SHA-1: 1df20a83641ba2a2bc9c96154b0282a417883ce1 SHA-256: 42fa06a15fdea2bb99b35370acd74038ebab43756050b72541489e5d4eda478a
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors, disguised as 'free generator' or 'game hack' lures. The document body explicitly mentions 'free Robux' and 'Robux Generator', aiming to trick users into clicking the malicious links. The ML classifier also flagged this PDF with high confidence, indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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.tw/app/431946152/how-can-you-get-free-robux-game-hack In PDF document text
    • https://bazilikum.com/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://bazilikum.com/images/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • https://bazilikum.com/images/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://bazilikum.com/images/minecraft-login-free_GM479516143.pdfIn PDF document text
    • https://bazilikum.com/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://bazilikum.com/images/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • https://bazilikum.com/images/minecraft-font-free_GM479516143.pdfIn PDF document text
    • https://bazilikum.com/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://bazilikum.com/images/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://bazilikum.com/images/free-tiktok-likes_GM835599320.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_off000027bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27BD 22140 bytes
SHA-256: c2f8ad43713e4c528f48c1542171407cf59847430dd13cbd635f11fbcf9924e9
font_01_sfnt_off000058bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58BC 18860 bytes
SHA-256: 3add24dcf1475cac500c121069f698e62b0696d093573e8c97a80decf3f01ac7

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