Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dda3c1cf9701666…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 15:12:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4d3f0faae1f5f157b050db07d2742c1a SHA-1: 94a7956ae92395dcad9b38fdff41092304eb988a SHA-256: 2dda3c1cf970166657fab8b8fab31e1b06698ad28749945e5e076852a220ac6e
142 Risk Score

Malware Insights

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

The PDF contains numerous links disguised as game hacks and generators for popular games, indicating a lure-based attack pattern. The heuristic firings, particularly 'PDF_SEO_LINK_FARM' and 'PDF_GAME_HACK_REDIRECT_LURE', confirm this. The primary IOC is the redirector URL http://netcdn.tw/app/431946152/games-on-roblox-that-give-you-free-robux-game-hack, which likely serves as the initial point of compromise.

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/games-on-roblox-that-give-you-free-robux-game-hack PDF link annotation
    • http://stitqi.ac.id/website/repository/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-vip-server-for-roblox-gravity-ship_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/roblox-infinite-jump-script-hack_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-easy-robux-vortexx_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/basic-roblox-lua-programming-book-free_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/com-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/hack-to-send-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/roblox-piano-hack_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_off00003001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3001 21824 bytes
SHA-256: 192857ae2918f7b2e1a5f628c2a3d4c2205ea0819f75dee180384f29f483fe02
font_01_sfnt_off00005ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFE 19716 bytes
SHA-256: 3217d2b45e6aba390097db31ed4f489c97a69b2175e2ab7441deb7edbbce2f2f

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