Malicious PDF — malware analysis report

Static analysis result for SHA-256 44e6b33626e6d891…

MALICIOUS

PDF

55.6 KB Created: 2021-06-08 19:00:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 62ef72e47eca06a2ced5337f1474fea4 SHA-1: 65fa1d4f20466ff2f673fed7c0950569961fee02 SHA-256: 44e6b33626e6d891fdbfa719e81ac88f70c1c121d1b45404f207c79fd6ead15a
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 0.9718

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 https://netcdn.tw/app/431946152/draw-free-roblox-game-hack PDF link annotation
    • http://www.kcmconsulting.com.au/images/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/free-t-shirt-adidas-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000054e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54E5 24896 bytes
SHA-256: c73e8fab34959e763d0b16f41d03301838c69d10d3dd6362974d65b4ecf0ac86
font_01_sfnt_off00008e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E55 12848 bytes
SHA-256: 83f2eb1fef09f277d68fe50aac03f5d06cbf34814e5d33016d9e734e09dc6c38
font_02_sfnt_off0000b65d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB65D 18508 bytes
SHA-256: a94f8e65716fb147a771064767bc41d4b09013b4f76816d65f2dd6db89c77c6c

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