Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0878fbd803745bc…

MALICIOUS

PDF

45.8 KB Created: 2021-05-14 04:41:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 984134bd8afacf6d60ab92f831ae9ab8 SHA-1: 6c10369a806bf7b94b85ab93be89bad131dd82bb SHA-256: e0878fbd803745bc0e4d3c4d0f0d9cc9132cf1c45702b24286e50d9369e55f87
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free game hacks' and currency. The document body, though partially corrupted, contains text related to 'Free Robux' and a URL matching the malicious redirector. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/free-robux-without-human-verification-game-hack In PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/robloxfun-com-robux_GM431946152.pdfIn PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://dohafashionstores.com/uploaded_files/userfiles/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://dohafashionstores.com/uploaded_files/userfiles/files/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://dohafashionstores.com/uploaded_files/userfiles/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://dohafashionstores.com/uploaded_files/userfiles/files/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://dohafashionstores.com/uploaded_files/userfiles/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://dohafashionstores.com/uploaded_files/userfiles/files/hack-robux_GM431946152.pdfIn PDF document text
    • http://dohafashionstores.com/uploaded_files/userfiles/files/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://dohafashionstores.com/uploaded_files/userfiles/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://dohafashionstores.com/uploaded_files/userfiles/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://dohafashionstores.com/uploaded_files/userfiles/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://dohafashionstores.com/uploaded_files/userfiles/files/roblox-e-free_GM431946152.pdfIn PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/ios-coin-master-hack_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_off00004c96.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C96 29284 bytes
SHA-256: b5513d76b37552474a13a107db8274fc5a460f225ecb4237f0c6a5a4c1146ac3
font_01_sfnt_off00008e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E10 19224 bytes
SHA-256: 69162c0303826e3a88150cee7b6b12b50ba56e04bc46253c0e5eb9f80ac8a399

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