Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d1af570e6b280f…

MALICIOUS

PDF

43.2 KB Created: 2021-06-03 07:17:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f3407199771552c1c8c5552699fe63d7 SHA-1: 28ed1e9e233ef12d6f5f0ee73187fe56dc8f8846 SHA-256: 54d1af570e6b280f7090016928b9249fa2a3039c8febad7670266333b008ba78
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free spins, directing users to external URLs. It also exhibits characteristics of a link farm, embedding numerous PDF links that likely serve to manipulate search engine results or redirect users to malicious content. The ML classifier strongly indicated maliciousness, supporting the observed redirection and link farm behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/coin-master-500-free-spins-game-hack PDF link annotation
    • http://library.fisip.upnvj.ac.id/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-daily-free-spins-and-coins-2021_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_004_off00004ece.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ECE 24276 bytes
SHA-256: 37e7dbbc179d1a01de2a635dbc66cc7ea5402125e726bf4144a08fee0f2f99e1
font_01_sfnt_off0000865c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x865C 18192 bytes
SHA-256: 125a73f883adbce2d9ba98dbcdb707663d1ca3c21f762afcc3d4ea8c4cd052f9

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