Malicious PDF — malware analysis report

Static analysis result for SHA-256 499c61db69f68173…

MALICIOUS

PDF

35.2 KB Created: 2021-06-20 20:20:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fceee9d6b6d86e5a8b296c53ec5bce51 SHA-1: 6ae7b286505b35cd3ed25fa2f1d397475d7d95e3 SHA-256: 499c61db69f6817394a1c06b0109e4c4d254608abc5a63592157b193b69f7d25
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links that redirect to sites offering game hacks and free currency, identified as malicious redirectors. The document body and heuristics indicate a lure to download potentially malicious content disguised as game cheats. The ML classifier strongly flags this PDF as malicious, suggesting it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/roblox-free-bc-v3rm-game-hack In PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/spinuri-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/robux-only_GM431946152.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/hack-event-on-roblox_GM431946152.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/pokemon-go-free-android-download_GM1094591345.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/roblox-assassin-hack-2021_GM431946152.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux-not-clickbait_GM431946152.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-100-robux_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_off00003273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3273 22416 bytes
SHA-256: cdfda172ab7f68e96126b4a68a129f38ffffd1ef42c52e895e8f28e4cfb72238
font_01_sfnt_off00006444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6444 19216 bytes
SHA-256: b9e9d718c70cd3ecab346983ccb38ceef9a3cac41d650160bd6dff809f3530f8