Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef0cede5c0023a52…

MALICIOUS

PDF

45.4 KB Created: 2021-05-14 09:30:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 200ff9a325f1e372507ab3b763c77ff0 SHA-1: 51a3275ee4d1670da343e2ea004ce36a3002db07 SHA-256: ef0cede5c0023a52e58eb8c2f599e660e5e29a1fc06817230cd032b87d6ed6e6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector, specifically targeting Coin Master. The embedded URL, https://netcdn.xyz/app/406889139/coin-master-free-spins-link-no-verification-2021-game-hack, is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick users into visiting malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/coin-master-free-spins-link-no-verification-2021-game-hack PDF link annotation
    • https://www.clarence-rockland.com/images/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.clarence-rockland.com/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://www.clarence-rockland.com/images/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://www.clarence-rockland.com/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.clarence-rockland.com/images/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.clarence-rockland.com/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.clarence-rockland.com/images/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.clarence-rockland.com/images/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://www.clarence-rockland.com/images/robux-money_GM431946152.pdfIn PDF document text
    • https://www.clarence-rockland.com/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://www.clarence-rockland.com/images/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • https://www.clarence-rockland.com/images/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.clarence-rockland.com/images/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.clarence-rockland.com/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://www.clarence-rockland.com/images/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://www.clarence-rockland.com/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://www.clarence-rockland.com/images/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • https://www.clarence-rockland.com/images/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.clarence-rockland.com/images/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.clarence-rockland.com/images/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aaf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AAF 24488 bytes
SHA-256: aed047014d35941373e25647d3f528932c3aedcc2c6ed743ab4ed0a35af84c56
font_01_sfnt_off0000832b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x832B 3124 bytes
SHA-256: 9967c6221325a4ff3f7c4336922605f990450164c2eee2df708cc81823c6ec98
font_02_sfnt_off00008e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0A 18592 bytes
SHA-256: f74899e085c91cd53f5ca09b8a5278408f496fc0c0b246b6d10c1aa0f6296d24

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