Malicious PDF — malware analysis report

Static analysis result for SHA-256 62af618c867ed70a…

MALICIOUS

PDF

39.4 KB Created: 2021-05-12 23:57:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d2f880c59f47e2ed05947610f387854a SHA-1: 60521d3589d2dfb0a93d1dd73b971b9926f1cf1b SHA-256: 62af618c867ed70a135a66406a89d724464fb90d2a1d90a8d047d52de64679d6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as "game hacks" and "free generators". The primary lure, "Coin Master Spin Link Hack", directs users to `https://netcdn.xyz/app/406889139/coin-master-spin-link-hack-game-hack`. The document body also contains numerous links to other potentially malicious PDF files hosted on `grupodin.com.br`, suggesting a campaign distributing malware or phishing content through a chain of redirects and fake documents. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 3

  • 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.
  • 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-spin-link-hack-game-hack In PDF document text
    • http://grupodin.com.br/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://grupodin.com.br/images/free-robux_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-hack-ios-10_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://grupodin.com.br/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/como-hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/village-coin_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/install-coin-master_GM406889139.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_off000047ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47FF 26168 bytes
SHA-256: 00c924b584c8ae4447d2cb587bf39119da38f6b846f6b07bb86964b9a612ba16
font_01_sfnt_off000083fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83FB 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132

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