Malicious PDF — malware analysis report

Static analysis result for SHA-256 de9eefcadd77c082…

MALICIOUS

PDF

32.8 KB Created: 2021-07-06 04:23:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 59af220c07fd3e455f713a36c486e3ee SHA-1: a3389bd9d96ebcbcc1745ccdf2833cb5e02b72b6 SHA-256: de9eefcadd77c082130132371f060e5393b28b9f7d7c4087dfc508718f093b0c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'generators'. The primary malicious URL identified is http://netcdn.tw/app/479516143/hacker-minecraft-song-game-hack. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content.

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/479516143/hacker-minecraft-song-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/descargar-hack-para-hackear-cuentas-de-roblox-descargando-algo_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/blue-pants-roblox-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/hacked-games-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-www-com_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-free-for-pc-download_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/http-robux-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/pubg-uc-redeem-code-today_GM1330123889.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-do-you-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-infinite-robux_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_off00002eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB4 21448 bytes
SHA-256: 9cf0ac0f2f523f28efc4fd2d63cc51498e2127150043a613663cbe552fd24b75
font_01_sfnt_off00005da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA6 18168 bytes
SHA-256: 37e3c409e679a213a10e0592b8ff177cf348fa9834d19b03b17241e7ed0c948b

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