Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef86316066abfba3…

MALICIOUS

PDF

31.7 KB Created: 2021-07-06 01:00:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 08531fa9475a8ad00546787ce813b549 SHA-1: c382e44b17289f3b01801be8b689b7878d6f35ed SHA-256: ef86316066abfba3e77c7f3e17575aae8c742696f169e9638034406df3ccbd91
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one to a known malicious redirector infrastructure, masquerading as free game hacks and download codes. The primary lure URL is http://netcdn.tw/app/479516143/minecraft-xbox-360-free-download-code-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at redirecting users to potentially malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 3

  • 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.
  • 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/minecraft-xbox-360-free-download-code-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/b-tools-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-roblox-hack-no-human-verify-for-tablets_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-game-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/pubg-uc-daraz_GM1330123889.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/mcpe-com_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-villages_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-2021-no-human-verification-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/criminal-vs-swat-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-free-codes-live_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-obc-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/boku-no-roblox-hack-cash_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-prison-life-cheats_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-hack-rbx-juin-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3164 22324 bytes
SHA-256: bb89d6df727ed889afac0c74bcf87a03a4696b04b63ff9b1550468db4aeffb7f

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