Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e1834acf1c7da3…

MALICIOUS

PDF

43.2 KB Created: 2021-05-12 19:54:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1da0a05f0ddfc1c1de77d7c4c4f8cf5b SHA-1: 48238cea38b43856a57c45115bf58115a0eae889 SHA-256: 24e1834acf1c7da3ba5fc765646bb803f5381f70c030cc93a1a9076ac667095d
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF document was flagged as malicious by an ML classifier. It uses a ClickFix paste-and-run lure. 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 0.9969

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.xyz/app/479516143/how-to-hack-a-minecraft-account-game-hack PDF link annotation
    • http://repository.unla.ac.id/repository/hack-client_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/spin-link_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/fast-robux-online_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spins-and-free-coins_GM406889139.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
stream_003_off00004d7a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D7A 25488 bytes
SHA-256: 6e0e08182393dfdbb60ed6839bcf517a03de5ac08665497b9d0fc21c6e7d143c
font_01_sfnt_off000086f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86F3 18184 bytes
SHA-256: 9b8f26e31d459421e9e5b83d6a53d579ef5ea49b0db69369fb37c1c5c6cb5db0

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