Malicious PDF — malware analysis report

Static analysis result for SHA-256 45173432e453dada…

MALICIOUS

PDF

34.9 KB Created: 2021-06-18 03:39:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 93c40c651d273382c8d17c3da8cfa876 SHA-1: c1a598fa5c0ea0c12a9bcf5af7a4dcae3d18ffe7 SHA-256: 45173432e453dada1a76aaabd4093579d17955393d7de306dcda0a5be9feb001
162 Risk Score

Malware Insights

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

The PDF document employs a lure related to game cheats and free generators, directing users to a network of external URLs. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of linked PDFs, suggesting a link farm for SEO manipulation or to distribute further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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/cheats-for-jailbreak-on-roblox-game-hack PDF link annotation
    • http://io24.com.ar/images/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/adopt-me-roblox-cheat-codes-twitter_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-free-shirt-not-model_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-com_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/ex7-roblox-free_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/is-pokemon-go-fest-free_GM1094591345.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-robux-nicster_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-hack-exploit-project-pokemon-site-youtubecom_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/tiktok-free-follower-no-human-verification_GM835599320.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-hack-roblox-account-on-phone_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/robux-money-cheat_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-06-accounts-roblox_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-robux-promo-codes_GM431946152.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_off00003106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3106 22448 bytes
SHA-256: a6720e86b148c9d285cd20b8a9589df0eb883b59b1eae9e740b6c7505e4b5de6
font_01_sfnt_off0000633b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633B 19192 bytes
SHA-256: 4c15ff4006cbd11f55d14f2a95e80687a805ff626a8e73fbe8b1134eb51a9aca

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