Malicious PDF — malware analysis report

Static analysis result for SHA-256 052dfe165057b3d7…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 12:48:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: fe0cc3db5f6f5ab17e6b4e816f99ab8c SHA-1: 6a481e92dc2e94aeb2595dc5330759c6d5e45310 SHA-256: 052dfe165057b3d70f4190055f5f95fe0030c4c61d7f27e7c0dfec3103a3d004
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/free-robux-hack-us-game-hack PDF link annotation
    • http://oca.undil.tl/repository/roblox-account-taker_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-minecraft-mods-for-pc_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/demon-roblox_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-hackers-list_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-coin-master-credit_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_004_off000050e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50E7 25968 bytes
SHA-256: 84839e9967ff1ace90dc928a105a076393473c33ccd645984da28bce04109c57
font_01_sfnt_off00008dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DFC 18600 bytes
SHA-256: be32b0f906764c1f2317decc7ac5a24a5975e1ace61028a3a9703984df87bb8b

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