Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b45b9bd0774d62…

MALICIOUS

PDF

45.5 KB Created: 2021-06-02 15:09:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1fbcd1c09880b641df3994113b1f4549 SHA-1: 286637b11c4bc754e28b35599f8ad94fe77d9e4a SHA-256: 42b45b9bd0774d62146b6d6a341f7298c107fe066aa0501a556d0c1a484f7436
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The ML classifier also flagged this PDF as malicious with high confidence. The document body and embedded URLs suggest a phishing attempt to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/431946152/robux-cheats-2021-game-hack In PDF document text
    • http://reggieslockandkey.com/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-tiktok-followers-generator_GM835599320.pdfIn PDF document text
    • https://reggieslockandkey.com/images/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-free-spin_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
    • http://reggieslockandkey.com/images/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-minecraft-coins_GM479516143.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
stream_004_off000051c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C5 26092 bytes
SHA-256: c2c11729e462fd4aa20c86687767a7eb73051f20ebc2e6e8828a749b2b988996
font_01_sfnt_off00008d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D83 18752 bytes
SHA-256: 77929033618b9a8f0c535d4afa1599ac1980c883310340dd4da7315c927a8cbc

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