Malicious PDF — malware analysis report

Static analysis result for SHA-256 682749877bcc8437…

MALICIOUS

PDF

40.3 KB Created: 2021-05-14 08:59:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 122bb7f96b3eb30b6024ec18350661d0 SHA-1: 636486cfa11c7f2908f77c895c56e12bfc9d29d0 SHA-256: 682749877bcc84375e2fcbeeecec9b04362c78c9643c640d24e58dc00ad64bbe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free currency' lures. The primary redirector URL is https://netcdn.xyz/app/406889139/coin-master-hack-iphone-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector chain designed to lead users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-hack-iphone-game-hack In PDF document text
    • http://zarinnameh.ir/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-roblox-gear_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/roblox-avatar-free_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
stream_003_off0000460a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x460A 23792 bytes
SHA-256: a36bff067c2f37c8601e7063444e6594003fd744058f9314c04d825466364321
font_01_sfnt_off00007be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE5 18060 bytes
SHA-256: 9ccc1d8bd8827427bdd2e576ac4afcbf92768d6c7b4bf1f6dc8c42a95cbbb1c2

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