Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ffc389e86456747…

MALICIOUS

PDF

46.2 KB Created: 2021-05-15 22:34:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ad35ae08e36dfd7804d92a73336332df SHA-1: 3dc42fddc7a3c39b23ad1ac6ad57b891486ac02a SHA-256: 2ffc389e8645674783dd6e7f0ef91fb8a848e14a5bd4a7de267258ac106818dd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, that promise free game currency or hacks. The document body and embedded URLs suggest a lure for popular games like Coin Master and Roblox. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a high likelihood of redirecting users to malicious sites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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-free-spins-link-facebook-page-game-hack In PDF document text
    • http://brinicombe.co.uk/images/login-robux_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://brinicombe.co.uk/images/freerobux-hack-us_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/master-coin-hack_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coinmaster_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-free-spins-link-2021_GM406889139.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004907.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4907 27196 bytes
SHA-256: 9d002e4d0dd720482c93817540776db46eced6572f77774edb6b1dcbb9bd68ec
font_01_sfnt_off00008754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8754 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off000090f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90F5 18656 bytes
SHA-256: 56fd455a4e74d684af59d29ece8fb42f6cec19ee4836a34a997115c3c0d135ca

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