Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea8a9bad83af731…

MALICIOUS

PDF

43.1 KB Created: 2021-06-03 07:55:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bc2b07e88c31ce47ec0572f8f4e1ca59 SHA-1: 1818f49256eea747b693d53b98920f348fda1b6f SHA-256: 9ea8a9bad83af7315cf3968ae98763a1b75fd965415bf7c27f90d6f0af04b515
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and free in-game currency, such as Coin Master spins and Robux. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://netcdn.online/app/406889139/coin-master-spin-hack-trick-game-hack'. The document body also contains this URL and other links to potentially malicious domains. The presence of these lures and the identified malicious redirector strongly suggest a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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.online/app/406889139/coin-master-spin-hack-trick-game-hack In PDF document text
    • http://perpus.i2s-learning.com/repository/collect-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/mc-update_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/pokemon-go-free-and-inter-egg-sting-development_GM1094591345.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/is-minecraft-free-on-xbox_GM479516143.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004d38.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D38 24904 bytes
SHA-256: 5a7edf673ed1d027d1a2175c88ec58e5c228ff43b2d43fe0481d15dd6622669b
font_01_sfnt_off000086c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86C8 17892 bytes
SHA-256: 4bfb4f0e693ff7770b94f95e309e8f86fd0b36da1cc4d74f533703e272a9a7c8

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