Malicious PDF — malware analysis report

Static analysis result for SHA-256 0528c7c074950c74…

MALICIOUS

PDF

34.8 KB Created: 2021-06-21 16:46:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 9e5f2c2e9b38177740cfe1d72187d143 SHA-1: 78075d43441be929fae8f6d2355c66a35a1b65bd SHA-256: 0528c7c074950c744c71c6a2ca1f25a2483eb2621cb5cab4d3c9b1e2d3345547
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free in-game currency and hacks for popular games to trick users into clicking malicious links. The embedded URLs, such as http://netcdn.co/app/431946152/how-to-get-builders-club-for-free-roblox-game-hack, lead to known malicious redirector infrastructure. While no scripts were extracted, the PDF structure and heuristics strongly indicate a phishing or scam attempt designed to redirect users to potentially harmful websites.

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/how-to-get-builders-club-for-free-roblox-game-hack In PDF document text
    • http://apostolosandreaslemesou.com/images/free-robux-game-code_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-robux-needs-password_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-robux-1-000-000_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-make-acount-for-intriga-roblox-hack_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/roblox-cheats-2021-ios_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-daily-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-get-robux-for-free-hacking_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/roblox-free-download-windows-7-64-bit_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-robux-please_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/hacker-00-roblox_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-robux-websites-that-actually-work-2021_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
font_00_sfnt_off0000303b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303B 22460 bytes
SHA-256: 5be0942dab52379a3ae3811b3bf5082a17549e28856dd57210e2047a95804244
font_01_sfnt_off00006228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6228 19352 bytes
SHA-256: 7ef7bf46bdb079deffbbf1137a30bd611dfaba2dd430ab5ba4939b24411f0d2f

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