Malicious PDF — malware analysis report

Static analysis result for SHA-256 713ccd0854d29c57…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 00:26:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5dcb4a449be6fa7b7a3bc71e4c081f96 SHA-1: 2e8a270e9822b986dcb631110b4f771ed592bf85 SHA-256: 713ccd0854d29c5710550095cb2a85d44cea3cbe574787fd8b79b294c42d59cf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and cheats. The primary lure is a 'Coin Master Free Cards Hack' which points to a suspicious URL. The document's structure and embedded links strongly suggest it is designed to trick users into visiting malicious sites, likely to download further malware or engage in phishing activities.

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 http://netcdn.tw/app/406889139/coin-master-free-cards-hack-game-hack In PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/blox-best-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-hack-forum_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/pokemon-go-free-9db_GM1094591345.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-fnaf-rp-how-to-get-free-via-ilovecat123_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-free-download-mobile_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/script-executor-roblox-free_GM431946152.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_002_off0000324b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x324B 23032 bytes
SHA-256: 7aff1a0631c34ffd69e0ccb624bb5f4af7639cd8d322528f707dba120a4b5348
font_01_sfnt_off00006623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6623 18340 bytes
SHA-256: 46bbcb93cdf3c0d295b315ab7e658e4bf46b20485efcdd5d2b69d88a805ee664

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