Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4d42c704134a611…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 19:52:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 61a79a669ddc3ca8a9074eaec74278c7 SHA-1: 1debdff1ef399ce2c1efbdc34f2c9c85ef2e10b9 SHA-256: c4d42c704134a611394d7ce5d00f5996e3ee52f192ff5f7fb4d13657b5892b51
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 free spins for games like Coin Master and Robux. The primary lure appears to be a 'free generator / game hack' for Coin Master, directing users to the URL http://netcdn.tw/app/406889139/coin-master-free-spins-2021-today-game-hack. The document's structure and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites.

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-spins-2021-today-game-hack In PDF document text
    • http://lib-smansumsel.sch.id/repository/cheat-engine-change-stat-roblox_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/get-robux-today_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-app-ios-download_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_002_off00003162.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3162 23132 bytes
SHA-256: aba23bf8963378ef2e5fd94c29f6583484d11a1d75b73c897a8e1a77a19bebf1
font_01_sfnt_off00006568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6568 18928 bytes
SHA-256: 36a48a759b81b87537c08b2d93e7ece15db90ec581655e2887e19df272526279

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