Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bd8e78c2997f2dd…

MALICIOUS

PDF

34.3 KB Created: 2021-07-08 00:17:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: dd1405912ca9692db732599a52d48e35 SHA-1: 4f63a91f05d794e824c8ae828011b88cf6c4170c SHA-256: 4bd8e78c2997f2dda2f9ef42e4d08c834d8411e6925c0b5fb26340fac32d7d06
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or malware distribution attempt. The document body and heuristics confirm the intent to trick users into visiting these sites, which likely serve as a gateway to further malicious content. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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/how-do-i-get-free-robux-game-hack In PDF document text
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/cheat-roblox-windows-10-magnet-simulator_GM431946152.pdfIn PDF document text
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/free-robux-codes-generator-works_GM431946152.pdfIn PDF document text
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/rbx-com_GM431946152.pdfIn PDF document text
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/roblox-hacks-veiculos-simulaor_GM431946152.pdfIn PDF document text
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/how-to-make-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/roblox-hack-download-pc-free-robux_GM431946152.pdfIn PDF document text
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/how-to-buy-free-robux-using-inspect_GM431946152.pdfIn PDF document text
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/minecraft-online-free-no-download_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_off000030ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30CE 21652 bytes
SHA-256: 2e79284b50c4f0990925ee53c702cfa71d621a071b97b9a7764caead34c2fdcc
font_01_sfnt_off00006076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6076 19152 bytes
SHA-256: dbadd7ca2f39853e1d628412f433763acd544662f92d7d1ac8e48e35ccd177e9

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