Malicious PDF — malware analysis report

Static analysis result for SHA-256 84c6d6c1ada7ff6f…

MALICIOUS

PDF

41.4 KB Created: 2021-05-15 15:18:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bac3919c226cb124683ac7b905db6b77 SHA-1: 40d4d7fa06ec8ce2137741fc3391528a6d428aae SHA-256: 84c6d6c1ada7ff6f71cb08b8fab57ae97cfc721442b305aa8651386b6b03d576
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. 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 0.9971

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/479516143/minecraft-reach-hack-game-hack.
  • 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/minecraft-reach-hack-game-hack PDF link annotation
    • http://bau-lk.de/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/coin-master-level-3_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/original-roblox_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/coin-master-100-free-spins-link_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
font_00_sfnt_off000048e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48E1 24540 bytes
SHA-256: e00ad0c04f2aa2b400ca3f5061d7033a7279315ce08af75f28c95dc7d8969997
font_01_sfnt_off000080c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C1 17904 bytes
SHA-256: 338e778c1ae38c15f57d68695408d0432531e6a93a33e2a2d7ec381387a6f025

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