Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf226f03a2a4335…

MALICIOUS

PDF

43.7 KB Created: 2021-05-16 19:40:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 67c5846889fa271a45cf66da686d4a11 SHA-1: 5eb1282bb39ab3001964cf8ef9c067a94e4ca71f SHA-256: 0cf226f03a2a4335a0bf0354e68663dab2d6f447391ecf0689d7d9e8e772cf5e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating a lure for game hacks and generators, directing users to external URLs. The ML classifier also flagged this PDF as malicious. The primary URL, https://netcdn.xyz/app/406889139/coin-free-master-game-hack, is associated with a game hack lure, suggesting the document's purpose is to trick users into visiting malicious sites that likely host malware or phishing content. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/coin-free-master-game-hack PDF link annotation
    • http://aimp-market.ru/images/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://aimp-market.ru/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://aimp-market.ru/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/robux-come_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://aimp-market.ru/images/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://aimp-market.ru/images/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://aimp-market.ru/images/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://aimp-market.ru/images/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://aimp-market.ru/images/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://aimp-market.ru/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/promo-codes-for-free-robux_GM431946152.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_off000046dc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46DC 25092 bytes
SHA-256: 019b822c685f0151e912b657de0715bebee1ed6467ae5a46c4bb8a317e3a2dc8
font_01_sfnt_off0000800c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x800C 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000089bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89BD 17712 bytes
SHA-256: d81df6b65cf0bb045415549e23d0eb9d7e4a9ed7c869613af9af95d8dd41029c

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