Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aeffef5458f0312…

MALICIOUS

PDF

34.4 KB Created: 2021-06-27 16:42:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3e85f14ad024c98432bd7a2ed7738854 SHA-1: a32a17b12af69c8df628c295cb78c0c0d759f135 SHA-256: 4aeffef5458f0312c5b725291a8f1ae9eeab0f7782d74f819f8493dcc72ac939
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to websites promising game hacks and free currency, a common lure for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to drive traffic to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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) 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-do-a-peppa-hack-roblox-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/what-is-coin-master-app_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/kaio-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-hack-unlimited-robux-and-tickets-roblox-facebook_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-players-accounts-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-easy-and-fast-on-phone_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-generator_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-that-actually-works_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_off00002ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF6 22348 bytes
SHA-256: 6ed5657f8ecad0dd78d7afec00beb0b185184d4417ff43cf5cf8ea7f4cb4575b
font_01_sfnt_off0000607e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607E 19320 bytes
SHA-256: 905937128070beb85c4060f5bd43adb2bde4a9b50f0d4f6d7b194521830c555b

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