Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b8b4e92677254d0…

MALICIOUS

PDF

34.4 KB Created: 2021-06-27 20:46:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 06cd22173780b8e6a372319ed2dfb6b6 SHA-1: 4f9b5a48a1f67183f5bc3514791c41cee94fba7f SHA-256: 7b8b4e92677254d02ef30b3bfbc3184f80802c2ce903e0ac4b704cb308d51673
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 entice users into clicking malicious links. The document contains numerous URLs, including one pointing to known malicious redirector infrastructure, which likely serves to deliver a secondary payload or phish for credentials. The ML classifier strongly indicated maliciousness, and the PDF-specific heuristics confirm the use of redirector links for deceptive purposes.

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.co/app/431946152/free-roblox-card-codes-not-used-2021-game-hack In PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/easy-way-to-get-free-skirts-in-roblox-royale-high_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/tiktok-free-likes-no-verification_GM835599320.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/false-dbfp-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/download-free-robux-hack-on-pc-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-how-to-activate-hack-gui-script_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/get-free-robux-no-hacks-and-no-buiders-club_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/robux-sites-hacks_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_off00002e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7B 22372 bytes
SHA-256: d09f618355956a78ad7acbc848d0c5d3835e1f791e9bb526c776d4ae58039f45
font_01_sfnt_off00006072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6072 19328 bytes
SHA-256: 35594e14dfa24fd523c7ec90490afc62f719862a3bea67312bb207f0c93741a7

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