Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fea8570e0462368…

MALICIOUS

PDF

42.2 KB Created: 2021-05-11 01:42:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: af015bca95f05b721d553facb0b0b012 SHA-1: 67df50abb08e81ea911910f8486d15abd75a140e SHA-256: 5fea8570e0462368c526aea3f20751bc40f5adafba3b67031b7d622606f7a489
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The document body and heuristics indicate a lure designed to trick users into clicking these links, likely leading to further malware downloads or phishing attempts. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/free-spin-link-in-coin-master-game-game-hack In PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ad0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AD0 24380 bytes
SHA-256: 78795f393371173f5880eaa13e017949cc3d8e45b6fa730528bb35ea22cb7e8d
font_01_sfnt_off0000827c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827C 18316 bytes
SHA-256: 83e319b57b25df8003591b2f8cd8f74939fd682d39c72f42c8d3fdd92a1d2569

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