Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d19dbb823a42e82…

MALICIOUS

PDF

34.1 KB Created: 2021-06-28 03:28:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 354b4ae1a1a2846fa02c4266276769e2 SHA-1: f807cfc617ace3ee7d32b34a870e63d975994a24 SHA-256: 0d19dbb823a42e82b5b37a4361b9b9945dc7f10b77b1f63b57f848474989cf92
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to known malicious infrastructure, likely to deliver a second-stage payload or phish for credentials. The document body and heuristics indicate a lure related to free game currency or hacks, consistent with social engineering tactics. No scripts were extracted, but the embedded URLs and redirector findings are strong indicators of malicious intent.

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.co/app/431946152/how-to-get-free-robux-nicster-game-hack In PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/roblox-jailbreak-money-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/greenwood-town-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/donate-robux-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/robux-cheat-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/freerobuxvbucksexe_GM431946152.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/how-to-buy-pubg-uc-in-india_GM1330123889.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/coin-master-ios-hack-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
font_00_sfnt_off00002e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E26 22356 bytes
SHA-256: f2a2b7a50e1bd8424fa992303f93e1ae0a4996519f4fbb57183b79df3ac55bac
font_01_sfnt_off00005fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCE 19104 bytes
SHA-256: 02a8af3194a938f58952376a4011c9621b3aec38a86072dda7e05d62a2377db3

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