Malicious PDF — malware analysis report

Static analysis result for SHA-256 3530d40c521b4487…

MALICIOUS

PDF

35.6 KB Created: 2021-07-05 17:04:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2f7c1e829be224f8bf23c411658e069c SHA-1: 9f00f658dbee891da7b5474670b3b8b18492f1a5 SHA-256: 3530d40c521b44877a7910689599a0410915863144d0e586e3da409c13ccfe87
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as game hack lures for popular games like Roblox and Coin Master. The primary URL, http://netcdn.tw/app/431946152/roblox-royale-high-school-diamond-hack-no-human-verification-game-hack, is a direct indicator of a scam or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a coordinated effort to direct users to potentially malicious sites. No scripts were extracted, but the document's structure and content strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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/roblox-royale-high-school-diamond-hack-no-human-verification-game-hack PDF link annotation
    • https://library.elkatarie.ac.id/repository/how-to-get-free-robux-on-ipad-mini-2_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-gewt-free-robux-on-a-ipad_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/get-robux-free-no-disabling-ad-blocker_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-robux-glitch-mobile_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/cafe-on-roblox-studio-milkshake-set-free_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/strucid-battle-royale-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-viechle-simulator-how-to-get-free-cars_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-get-free-robux-no-hack-or-human-verification_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/avatar-the-last-air-bender-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-animations-roblox-catalog_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-become-a-hacker-on-roblox-ipad_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/robux-adder-hack_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-get-free-robux-in-roblox-2021-not-patched_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-robux-form-rblxgg_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/get-free-dominus-hat-roblox_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-printable-roblox-thank-you-tags_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-simple-robo-for-free_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-hack-download-pc-free_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/robux-800-fre_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_off00003185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3185 22264 bytes
SHA-256: 93e85122c3f8a88e2fa0ed67d494a773bc07fb5ca24e51cc9885048705a0310e
font_01_sfnt_off000062fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62FA 20100 bytes
SHA-256: a0c0dbaa653bf53b84895657460b6969f0d670126a462313a2e06223b5ebffc7

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