Malicious PDF — malware analysis report

Static analysis result for SHA-256 504be14b593d3c24…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 20:01:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5f4afa629647cc01a213eed98e024c54 SHA-1: 0ad68bf905eb80dc1c9d3fc531708283de5e94f0 SHA-256: 504be14b593d3c240893c2702bdec6c98e3e07a31794dad8b510f8b74150aa85
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. The document's structure and embedded URLs strongly suggest a phishing or scam campaign aimed at users interested in popular online games.

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/406889139/offers-to-get-free-spins-in-coin-master-game-hack In PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-robux-2021-no-waiting-instant-no-inspect_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-online-roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/pubg-uc-uk_GM1330123889.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-auto-mouse-clicker-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/hack-de-roblox-2021-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-to-get-redvalk-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/ban-roblox-pour-avoir-hack-des-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/download-robux-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/pastebin-robux-hacks-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/ccv3-roblox-hack-tutorial_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-codes-for-assassin-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-membership-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/speed-hack-roblox-wild-revolvers-download_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
stream_002_off00002f61.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F61 22648 bytes
SHA-256: dfa0869d275806f44b0dd272da2ddf0480caf9b18fc0752e178b9065bb1a9e5a
font_01_sfnt_off00006214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6214 18176 bytes
SHA-256: a5dda6ecc9550c88ef854abac2de0c7419869471da9a3b20b0ae64a03b2462f9

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