Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bcf44b8f226b028…

MALICIOUS

PDF

43.9 KB Created: 2021-05-12 05:39:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0fec85c873a5b6067bb4441bd32b25e1 SHA-1: 580eb40cc4aa31f63151659a39033d8f5debbf58 SHA-256: 0bcf44b8f226b0285912d370a65853c81efb66cdee5880284d1f4fccb0f4e458
102 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 0.9648

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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-spins-coin-master-links-game-hack PDF link annotation
    • http://183.91.70.7/repository/minecraft-jar-free_GM479516143.pdfPDF link annotation
    • http://183.91.70.7/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/minecraft-win-10-free_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_off000046c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46C1 24676 bytes
SHA-256: 291d40b9ccb56a725db8e2d92bdaaa4f0e620b6b831f0627b12f2ab028c39fc5
font_01_sfnt_off00007fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC0 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8972 18056 bytes
SHA-256: 07f1a9832fff0ce02b8ea8bcbd6448fb7022c7ac6c85a00fb5b887865844234a

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