Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b50e0465a05f6e…

MALICIOUS

PDF

35.6 KB Created: 2021-07-02 04:06:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d70af6cc0e4a28009387ec749523531e SHA-1: 151893e42f0e4891a55bcc3ef88fc26e8f3fc2b5 SHA-256: 29b50e0465a05f6eba6f2de1ab62d12c66f7fbd018fdf906babb97dbd96e71b1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux hacks' and similar game-related lures. The primary link, http://netcdn.co/app/431946152/free-robux-hacks-that-actually-work-game-hack, is identified as a malicious redirector. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-hacks-that-actually-work-game-hack In PDF document text
    • http://opac.stieimalang.ac.id/repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/cheat-roblox-speed-simulator_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-get-free-robux-yahoo-answers_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/roblox-vip-server-free-links_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/roblox-vip-server-free-link-vehicle-simulator_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-use-hacks-on-roblox-after-injection_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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_off00003216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3216 22656 bytes
SHA-256: 35e30d8763278d4d04d6cac16b5c5845a3f7da302e9f4bd7eb30bdc2c47940c9
font_01_sfnt_off00006486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6486 19608 bytes
SHA-256: 1d721879b76136f374cea87b8466fc1a035e9c5407911ed9937f0c2f7243ad51

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