Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b21ca2a9a640afd…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 20:56:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0608dacd47f2f5eee1c8e8e99acda185 SHA-1: 53514cb2aa53c8aa6d2ce98b68e5ae4abace6f55 SHA-256: 2b21ca2a9a640afdc08801fa73a14afe85c3cab510e4f549c6f1c901063debe8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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-jailbreak-cheat-engine-codes-game-hack PDF link annotation
    • http://digilib.ulm.ac.id/pusat/repository/how-to-become-the-hockey-mask-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-to-take-roblox-eye_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/cool-roblox-shirts-free-shipping_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/cheat-for-dinosour-simulator-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-wifi-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-gamepasses-for-free-script_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-stuff-roblox-march-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-shard-online-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-on-roblox-plates-of-fate_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/cipherv3-roblox-exploit-rocky-hacks-and-more_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-thru-premium-houses-in-roblox-pacifico_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-someones-roblox-account-with-link_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-exploit-lua-script-executor-free-no-virus-please_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-roblox-gear-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3062 21672 bytes
SHA-256: 6d7341869a0d19278287717b73e1a1986f21a536d3f748bd744a46b12be83008
font_01_sfnt_off00005fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC4 19200 bytes
SHA-256: 8b0a71bd944da3a77e2a34530ed70e298f0f5d9594633a82865bcfadcfd3f377

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