Malicious PDF — malware analysis report

Static analysis result for SHA-256 d23a1304eac66890…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 05:34:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d883c26141e79b1bb3ac062ba50908c0 SHA-1: 9de0bb52f8e44f53950febe7b5ca7c291b6ae85b SHA-256: d23a1304eac6689086099c2652975c75aef5b3f939b818ae07cb48cae8263a62
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on them by promising free game currency or hacks. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a social engineering attack aimed at driving traffic to potentially harmful websites.

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.tw/app/431946152/rbxfree-com-free-robux-game-hack In PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/roblox-business-simulator-cheat_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/free-10-dollar-roblox-card_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/exploiting-t-shirt-free-roblox_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/how-to-get-free-robux-no-joke-2021_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/roblox-com-cheat_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/room-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/how-to-get-free-instant-robux-no-inspect-element-proof_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/roblox-free-followers-bot-2021_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/how-do-you-use-tunturned-roblox-hack_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/free-robux-dec-2021_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/roblox-codes-cheating_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/hack-roblox-jailbreak-774_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_off00002e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E09 22448 bytes
SHA-256: 8b8c39ca916e0fcb61f69ebe96d22121ce5268c118108c36de2cd0a28d254380
font_01_sfnt_off00005fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCB 18976 bytes
SHA-256: 2aa9052e4078dfdf09f927976bfd3cf76f1a678b4d9b3ecd6888c6d9efbc292b

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