Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc31906222db0cd1…

MALICIOUS

PDF

43.6 KB Created: 2021-06-03 15:19:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4af472b24dba40732ab897443de5db47 SHA-1: 1b75c7b97895ae55f2cad7758f75bdef2ac6491e SHA-256: cc31906222db0cd14dde8f5f54e34a79db3ae8a0b2180a34118610b12c531e96
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting a "robux match game hack". The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to a site that likely hosts further malicious content or exploits. The document body, though heavily obfuscated, contains references to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/431946152/robux-match-game-hack In PDF document text
    • https://www.jcn.co.uk/uploads/files/files/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/earn-robux-online_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-codes-generator-no-verification_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F4A 24248 bytes
SHA-256: 463e2822d5a3fdfafd80f50549282589640070a809bd4d52556197bdc89e464f
font_01_sfnt_off000086f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86F4 18544 bytes
SHA-256: 4865ec158f9470bac4731bc6ea4e87b30e3d93ae422e073d270352522cf355fc

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