Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb0c2efc93c9224…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 06:46:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 851cee9808eb0d4d644035dfc79f539b SHA-1: 21c9de08c10bb36986b36a028b8085a07541f3b1 SHA-256: dcb0c2efc93c92244c8870802708fb6912f2212e07454220be8f5819fca44319
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links that are identified as malicious redirectors and point to sites offering game hacks and free currency. The document body, though partially corrupted, contains similar lures. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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-hack-apk-download-game-hack In PDF document text
    • http://36.94.36.7/elib/repository/how-to-get-free-robux-no-verification_GM431946152.pdfPDF link annotation
    • http://36.94.36.7/elib/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/how-togglw-the-hacks-in-robloxs_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/how-to-hack-coin-master-with-game-guardian_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/roblox-free-robux-plugin_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/how-t-oget-ant-free-robux_GM431946152.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
font_00_sfnt_off000032c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32C0 22600 bytes
SHA-256: 9701614ee5d2929c0e11a654366d3553e75fd0128328495b3c2fcce9dd0bde93
font_01_sfnt_off00006535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6535 18760 bytes
SHA-256: e0717da7bc261f17ea8f419e12a90ec9f2f0bf974bdb9909681cf6939735c129

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