Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb6717c841261269…

MALICIOUS

PDF

43.1 KB Created: 2021-05-14 19:00:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c39250f9a6f7ac5fc296a719650b271d SHA-1: 17c7b43bb65efd6e0e72fea27def52a035f5e163 SHA-256: cb6717c8412612696c9c7a79fe3f1817d9e9376e46e6a30dd760a77a87edc415
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising free game currency and hacks. The primary lure URL is https://netcdn.xyz/app/406889139/new-free-spins-coin-master-game-hack, which is flagged as a malicious redirector. The document body and embedded link structures indicate a social engineering attempt to trick users into visiting these sites, likely for further malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/new-free-spins-coin-master-game-hack In PDF document text
    • https://malungtreks.com/userfiles/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/roblox-gang_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/claimrobux-net_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/download-coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-spin-link-today-free_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
stream_003_off00004968.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4968 27016 bytes
SHA-256: b712b4eef14a757be830eac08c8a45646c661019bd5238737577a885e414e02f
font_01_sfnt_off000086d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D1 18052 bytes
SHA-256: f6ae81a0f80ce3ee57e108e39e83609ad458bab121923b9094461962bc480278

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