Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a3eae58a3ab1c0…

MALICIOUS

PDF

36.0 KB Created: 2021-07-05 15:34:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 94d809d2d9488d6cc775b12077dc0c5c SHA-1: 3f1e5e72fe6bdac5640f6183f36bf45187fda98d SHA-256: 11a3eae58a3ab1c0d1bb3f6e7caf802bf4db68d53bf2ccad2e022af0d04237ef
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.tw/app/431946152/how-to-get-free-robux-easy-hack-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/roblox-jailbreak-edid-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/wolf-or-other-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-strucid-stop-start-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/connect-to-roblox-account-roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-hack-on-roblox-games-phone_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-codes-2021-november_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-robux-hack-pc-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-promocodes-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/cool-pants-roblox-free-catalog_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/ive-been-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-script-executor-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-do-i-hack-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-bee-swarm-simulator-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-codes-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3430 22644 bytes
SHA-256: a3434200a0581ed3083f14e8f535adf004ba312172196b6ae33d5b0490f23797
font_01_sfnt_off000066c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C1 19336 bytes
SHA-256: 78f916c03dd9b91bc5a9b0fe28cce5081736cfe4fe32979dd63f9f8a24f066e1

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