Malicious PDF — malware analysis report

Static analysis result for SHA-256 52b54fabe96a979e…

MALICIOUS

PDF

35.7 KB Created: 2021-07-06 12:29:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 336f8b65dee4ccbdb485396668a85348 SHA-1: 4292004d3bb5e91e0302033ffa79f56fd2927144 SHA-256: 52b54fabe96a979e1ab5ce1718da1a271fa0ff323d33c3f20dda4333c10c934f
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 in turn hosts further lures and potentially malicious PDF files. The document body and embedded URLs confirm the social engineering pretext of offering game-related cheats.

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/coin-master-free-coins-and-spins-link-game-hack In PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/download-roblox-free-on-the-apple-store_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/roblox-mm2-coin-hack-2021_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/how-to-get-free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/free-robux-script_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/invisible-skin-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/how-to-get-admin-commands-on-roblox-jailbreak-free_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/how-to-get-free-roebucks-in-roblox_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_off00003418.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3418 23216 bytes
SHA-256: 4fff114451a825532547b52b89f4ff10a08f9a331aad904b5a29eee3a03b4e54
font_01_sfnt_off00006837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6837 18520 bytes
SHA-256: 4a00b74065c845a8261d6cc4e101dd5c2a388e973e7fc9ab28e7679a34d9d18b

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