Malicious PDF — malware analysis report

Static analysis result for SHA-256 c44778da8ca7175a…

MALICIOUS

PDF

42.1 KB Created: 2021-05-13 09:03:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 73f35d45994af1d7ebadcbed893dcbe6 SHA-1: 084ad1b28869f63087582ebacb5a1eca4aaf34a9 SHA-256: c44778da8ca7175a8ab8ed811807a313c6fc541044911f6494a9c362eed1ec27
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as offers for free game hacks and spins. The primary lure URL is https://netcdn.xyz/app/406889139/spinuri-gratis-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to exploit user interest in free in-game items to redirect them to potentially malicious content or downloads.

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/spinuri-gratis-coin-master-game-hack In PDF document text
    • http://educhina.mn/editor/files/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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
stream_003_off00004988.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4988 25672 bytes
SHA-256: 6b28041be31accea7a8d7c9185155cb72444d226fc78148e105a3bb644d13c9f
font_01_sfnt_off0000835a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835A 17860 bytes
SHA-256: 372d64fe8ef96255a12fa644d41377f2b117b1e32b2da9ab2f07e049597555f8

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