Malicious PDF — malware analysis report

Static analysis result for SHA-256 adaa2773b88a772e…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 20:35:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a3ce3d0ecd211cb124c92b2e1febbba0 SHA-1: 7a495fa89a0863acbd9f290d69c51083b8f89f7d SHA-256: adaa2773b88a772e56c05241314312d8de549718fbe3cac61094cdedea0b0b52
142 Risk Score

Malware Insights

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

This PDF document is designed as a lure, using the promise of game hacks and free in-game items to trick users into clicking links. The document contains a large number of embedded URLs that point to other PDF files, forming a link farm. The primary URL, http://netcdn.tw/app/406889139/rare-free-links-to-coin-master-game-hack, appears to be a redirector to this network of lure documents.

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/406889139/rare-free-links-to-coin-master-game-hack PDF link annotation
    • http://digilib.iailm.ac.id/repository/free-robux-promo-codes-no-inspect_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/one-piece-millenium-roblox-hacki-book_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/wurst-client_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-hack-to-get-a-girlfriend-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/pet-paradise-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-gift-cards-not-used_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/rbx-tools-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-coins-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
stream_002_off00002dfd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DFD 22972 bytes
SHA-256: f565ed1ace6181cf33f4dda46e9da5e0e92abc12abb0662b468a0f3e8058897b
font_01_sfnt_off000061bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BD 18168 bytes
SHA-256: 28e527c2f3fabd3fa8db3fd5bdf3ee8cb30571ff07cbc68c1d05a68fcf9a278f

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