Malicious PDF — malware analysis report

Static analysis result for SHA-256 55492ecb020f57df…

MALICIOUS

PDF

45.6 KB Created: 2021-05-19 13:39:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: abdbd9323c66029702fa14064a1b01fd SHA-1: 11c4c5dade1573bde53277805903a8b9e6201da8 SHA-256: 55492ecb020f57dfa161a9b5ab6db9b58264f0eb8497b3a7b0e5f2638250c59d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game currency ('Robux') and links to external URLs that are likely malicious. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly suggests a scam or malware distribution. Although no scripts were directly extracted, the embedded URLs are the primary indicators of malicious intent, likely leading to a phishing site or a download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/how-can-you-get-free-robux-game-hack PDF link annotation
    • https://www.zagi.hr/files/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://www.zagi.hr/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/mcpe-116_GM479516143.pdfIn PDF document text
    • http://zagi.hr/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/coin-master-free-spin-sites_GM406889139.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_003_off00004702.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4702 33032 bytes
SHA-256: 5c95f31c117bde8c3dde200d0038b3ae4259f124136abc212a57138186dc552b
font_01_sfnt_off00008ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF9 18672 bytes
SHA-256: b25769fe22a84510cbe545ecc77c61068e90e31ebb29fb78564d629eaf3a10b0

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