Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a73e0d4760c8c9…

MALICIOUS

PDF

36.2 KB Created: 2021-05-24 15:03:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2e6386aa3446a085ce3671948299a8e4 SHA-1: 4c2ad1c311a7670ba95b8373ebefef54524c7131 SHA-256: 36a73e0d4760c8c9bdc48a6194c3a6d87b7905a0a06d1923f59b2d567b01ece6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it links to a game hack lure, specifically mentioning 'free spin link for Coin Master'. The embedded URLs point to domains that host similar lures or potentially malicious content. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/free-spin-link-for-coin-master-game-hack PDF link annotation
    • https://cluster-consulting.com/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/easy-robux-com_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003287.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3287 26168 bytes
SHA-256: c2200a34509119e30977870d91dcf047aa02f333ceee006d3ba1f812a5458ba1
font_01_sfnt_off00006d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0E 18056 bytes
SHA-256: b406b504177f6b640bc1dbcd325e02770f8a0621b64b682f119f0b5c1d0e735d

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