Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e470725579a9fa…

MALICIOUS

PDF

47.6 KB Created: 2021-06-03 07:25:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: be65f9866fb264517ef3fbcf3a5ea0a9 SHA-1: e43a6a5e4c393d481c841e9bcf8ea2455e7692b9 SHA-256: 33e470725579a9fa7a662b61b892a3055a13e88f72589a6dc726ebfb5a6199df
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a game hack lure to entice users to click on links. It contains a large number of external PDF links, suggesting a link farm or redirection mechanism. The primary URL, https://netcdn.online/app/431946152/how-get-free-clothes-in-roblox-game-hack, is likely part of a scam or phishing attempt. No scripts were extracted, but the PDF structure and embedded links are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/431946152/how-get-free-clothes-in-roblox-game-hack PDF link annotation
    • http://library.itekes-bali.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-do-i-hack-a-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-without-downloading-apps_GM431946152.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_off00005124.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5124 25636 bytes
SHA-256: cd5d5af657f6002960f45443e3faf81c5af41986bd2ee524c95e8d01f7ecbf9e
font_01_sfnt_off00008cd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD4 2984 bytes
SHA-256: 4adb8a917f49e7111d61a35b75f09762f191422f789e84659f5497848d60b01b
font_02_sfnt_off00009701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9701 18384 bytes
SHA-256: 76111e212c73e309f911ea93fbb90534067afec847155c36f3eee0f3141392db

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