Malicious PDF — malware analysis report

Static analysis result for SHA-256 13168773e571fe45…

MALICIOUS

PDF

33.9 KB Created: 2021-06-18 16:55:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e4588c6b02fbc3e47e18c7e67df53cbe SHA-1: 2b1d8a5d922fdfb1ad0e8d6ea1b7e173494a3c72 SHA-256: 13168773e571fe457dd4ffd5a75d155f5880ffb91f5319522da99b7930aeaa17
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/roblox-how-to-buy-robux-for-free-game-hack PDF link annotation
    • http://safari-crimea.com/images/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://safari-crimea.com/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/hack-this-roblox-account_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/synapse-download-roblox-hack_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/can-you-hack-your-own-roblox_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/roblox-royale-high-dimond-hack_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/t-shirt-roblox-free-survete-addidas_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/free-roblox-you-can-play-online_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/how-to-hack-money-in-gta-5-roblox_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/how-to-hack-a-account-with-btools-on-roblox_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/how-do-you-get-free-robux-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_off00002e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E26 22348 bytes
SHA-256: 3d9a5828c3306933cd6c5cf242ca147538c61ab74f37e0fd4cd775fdf9ea6aa1
font_01_sfnt_off00005fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDB 18948 bytes
SHA-256: 8a16c85644f3ca26e19703b2d672d0fb8e6eaf72a10b9cce059b6dc4481ed3a0

Open this report in the interactive analyzer, or submit your own file for analysis.