Malicious PDF — malware analysis report

Static analysis result for SHA-256 e07b81cc037731d5…

MALICIOUS

PDF

32.4 KB Created: 2021-07-19 08:23:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: eccd3b0e53d37b738c60ca1e8c709b66 SHA-1: be2ae03c28b9e62aa9137f167d493222686d7431 SHA-256: e07b81cc037731d52d5ada4daef4627fa61cea2f4902ad61d95a60bb3121ee70
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and a specific URL associated with a 'free generator / game hack' lure. The document body and embedded links suggest an attempt to trick users into visiting these malicious sites, likely to download further malware or engage in scams. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/479516143/minecraft-java-free-game-hack In PDF document text
    • http://gestibrok.com/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://gestibrok.com/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/hack-tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://gestibrok.com/images/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://gestibrok.com/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • http://gestibrok.com/images/free-robux-websites-2021_GM431946152.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_off00002f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F11 21476 bytes
SHA-256: b653b18d3cb7548b978c874b96c919cdaab9a0b2d8785c4b32ca57ded2896d76
font_01_sfnt_off00005dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD8 17848 bytes
SHA-256: c651dee67b00b36100d0c208f30a7974f38e9c4fefacd489da3c8fda34869f62

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