Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a7a26a319492f88…

MALICIOUS

PDF

44.1 KB Created: 2021-05-10 14:48:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c663b22d1f2fc7a65c44c1a21b56f738 SHA-1: 1333658c38fab9c28e17b7d15a12f543dd50485a SHA-256: 8a7a26a319492f886fd2fa2841463d1c5c03699e7afe4e13299fc7b7e4f166bc
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/coin-master-hack-online-generator-game-hack PDF link annotation
    • http://36.94.36.7/elib//repository/roblox-got-talent-piano-hack_GM431946152.pdfPDF link annotation
    • http://36.94.36.7/elib/repository/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/coin-master-hack-tips_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-2021-free-spins-link-2021_GM406889139.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_off00004807.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4807 25060 bytes
SHA-256: 67be47c64d9701723e71f4dbdf57da312111da90986e1e2fde19864178241c99
font_01_sfnt_off00008172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8172 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off00008b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B14 17788 bytes
SHA-256: f10d9d7ac26b37aa9393865027a0ede53c5b0e24a5f9161d6938870a0e29fed8

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