Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0f406b9e1ac314d…

MALICIOUS

PDF

44.7 KB Created: 2021-05-14 04:23:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4494b19950656b88c9ee10d71af5ee29 SHA-1: a4da9a01203994d65cece0b823465c8ae98c931d SHA-256: c0f406b9e1ac314d74d6108832c5ff03e83db0e4104212c47ef9fa85f9a796bf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free generators" or "hacks" for popular games. The document body and embedded URLs strongly suggest a social engineering lure to drive traffic to potentially malicious websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/coin-master-ios-hack-game-hack In PDF document text
    • https://bancroftandsons.com/images/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://bancroftandsons.com/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/roblox-exploit-scripts_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/113-hacked-client_GM479516143.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-hack-without-human-verification-india_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • https://bancroftandsons.com/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/daily-spin_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • https://bancroftandsons.com/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49D5 25536 bytes
SHA-256: 8e6dea86131519ac5460755b91e2b7e7fc935aca0aff23b5377214f816736c26
font_01_sfnt_off000083ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83ED 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00008d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8D 17716 bytes
SHA-256: b284cc0a3260b800c0eb101cd03c26d28dcaee11de2dc9fb598807f0165498ee

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