Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dcdbbb93acc267d…

MALICIOUS

PDF

47.8 KB Created: 2021-06-03 05:19:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3f9dbdd901fe690d78295ac1602f6212 SHA-1: 1636ae9d8db01e96e1a282eb242b2e67812b3820 SHA-256: 6dcdbbb93acc267d209ca2d649be7faacac4dff80ed3ac0cc3d3da2fac5b0e58
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links that redirect to known malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The primary link identified is 'https://netcdn.online/app/406889139/free-spins-coin-master-march-2021-game-hack', which is associated with a malicious redirector. This suggests a phishing or scam attempt designed to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/406889139/free-spins-coin-master-march-2021-game-hack In PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/bux-free-robux_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/roblox-builders-club-free_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000509e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x509E 25800 bytes
SHA-256: 9432784bf95047912b07e3587f852ed64225142d737168ab75f6a523b171f43f
font_01_sfnt_off00008c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C57 3460 bytes
SHA-256: 27f6ee24b80a0c45a340e32027a43d6c3a7853aac96563eed14d58819399f6a8
font_02_sfnt_off000097c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97C1 18452 bytes
SHA-256: f9f67c77da0d65153792dedd850da678f3a8682f9327ac55251990d25044da35

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