Malicious PDF — malware analysis report

Static analysis result for SHA-256 8738c4a8b4521706…

MALICIOUS

PDF

33.4 KB Created: 2021-06-27 15:30:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 71a145a8a61de0307a37254f55ab311f SHA-1: b58a74b8c84a286e5a3eaed0da9c172ab04b6b28 SHA-256: 8738c4a8b4521706e906579468140f09586cdb1e33b8bad49333bba5cdd4838a
142 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are disguised as game hacks or generators for popular games like Roblox and Coin Master. The primary lure appears to be 'free generators' or 'hacks', which is a common tactic to entice users into clicking malicious links. The document's structure and content strongly suggest it is part of a link farm designed to drive traffic to potentially harmful websites.

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.co/app/431946152/e-free-roblox-wiki-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/freespinandcoin_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-items-from-roblox-not-on-avatar_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-be-a-wannabe-hacker-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/exploring-free-rs-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-app-free-download_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-how-to-changre-your-name-to-something-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-developer-console-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-use-no-clip-hacks-roblox-2021-novenmber_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-cheat-in-lumber-tycoon-2-roblox-axes_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-green-banner-drawing-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-leaked-free-items_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-chest-in-coin-master_GM406889139.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_off00002c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C4A 22196 bytes
SHA-256: 1f259d24f8ea209274d52983fdf855bb19d02b446296a758bb0e0a9c5dcaab7e
font_01_sfnt_off00005d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D51 19136 bytes
SHA-256: 491244169d01875661e7d3910dff6d4ffff4206858566104f243cb18fdf341e2

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