Malicious PDF — malware analysis report

Static analysis result for SHA-256 51d96c94f077fa39…

MALICIOUS

PDF

38.0 KB Created: 2021-06-27 22:32:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 615e6800a3e29c06ade6981cb7f5a126 SHA-1: 6aa65510fa84bfdc2928a87f9a4d53c83df4aa43 SHA-256: 51d96c94f077fa396f817ae5f3bb00d79819cbc97838971c660339d2f28f789d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically targeting users interested in game hacks or generators. The primary lure URL, 'http://netcdn.co/app/431946152/how-to-get-free-girl-hair-on-roblox-game-hack', is associated with known malicious infrastructure. The document body, though heavily obfuscated, contains references to this lure and other URLs that likely serve similar purposes, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.co/app/431946152/how-to-get-free-girl-hair-on-roblox-game-hack In PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/free-800-robux_GM431946152.pdfIn PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/free-things-roblox_GM431946152.pdfIn PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/free-play-roblox-login-online_GM431946152.pdfIn PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/free-cartoon-animation-roblox_GM431946152.pdfIn PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/roblox-800-robux-free_GM431946152.pdfIn PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/robux-converter_GM431946152.pdfIn PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C5B 23016 bytes
SHA-256: caf51e6888bbb1b1fd924aba05d0f26803e88566f442df21152bf93c043158e1
font_01_sfnt_off00006fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD3 19036 bytes
SHA-256: d39dd4da8a82d1cf212625a8fd3f111ff99640819aaef3718dac741da5e69eeb

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