Malicious PDF — malware analysis report

Static analysis result for SHA-256 575f08042f1d28df…

MALICIOUS

PDF

48.4 KB Created: 2021-06-10 15:35:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 326098aade438906357df4dbd4b6941b SHA-1: 3ed1d8ca01a8f5dd224af547bbfed589c8ebfdc4 SHA-256: 575f08042f1d28df89179f2dfd5ac380a904cfa875bdc0a48040520b47ca4f0b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains links that redirect to known malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body and embedded URLs suggest a phishing attempt to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious redirector chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/free-robux-works-in-an-hour-game-hack In PDF document text
    • http://zarinnameh.ir/images/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • http://zarinnameh.ir/images/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-play-online-free_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/roblox-hack-gui-mac_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-robux-generator-simulator_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://zarinnameh.ir/images/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://zarinnameh.ir/images/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/roblox-create-a-shirt-free-shipping_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/114-4-hacks_GM479516143.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_004_off00005037.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5037 26432 bytes
SHA-256: e22df04cfc17fbd607011349136fac5a23d7b1033e593f39ba9754a6113298f5
font_01_sfnt_off00008d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D6E 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00009a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A15 18380 bytes
SHA-256: 47e2dca42fddf07e6d3630a8eec8ba996cec475c72fd22e8810b24d51423ad17

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