Malicious PDF — malware analysis report

Static analysis result for SHA-256 a56326f4f7a7420a…

MALICIOUS

PDF

43.1 KB Created: 2021-05-13 19:12:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c89fb80bcf18f545cccccb60ffa36e3c SHA-1: a77e755eb19e89811886ee22d97b7b1b789546d1 SHA-256: a56326f4f7a7420a6e674706b2dc4e76988c2eaca95b17ebfada02396c12bff7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing indicating it links to a 'free generator / game hack' redirector. The primary malicious URL identified is https://netcdn.xyz/app/406889139/free-coin-coin-master-game-hack. While no scripts were explicitly extracted, the PDF format can embed JavaScript, and the presence of external links suggests an attempt to redirect the user to a malicious site, likely for phishing or malware distribution. The document body contains garbled text but also includes the malicious URL and other suspicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9630

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-coin-coin-master-game-hack PDF link annotation
    • http://ipdrs.org/images/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/levvvel-coin-master_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/free-robux-website_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-official-website_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-hack-apk-download-2021_GM406889139.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_off0000444c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x444C 24428 bytes
SHA-256: 26db3d02cd9151f7ccf23b9e7712f4b7a14386fce067ec070bc8f7acc0c0cc64
font_01_sfnt_off00007c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C21 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off0000874a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x874A 17712 bytes
SHA-256: effefb876c7a76aa063811ff0160e46fb8a90dd5507c6c48ef6fa39823ab5c8c

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