Malicious PDF — malware analysis report

Static analysis result for SHA-256 579b6bd73ae2ad4c…

MALICIOUS

PDF

42.4 KB Created: 2021-05-19 16:18:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 61021bc864bc69cee08f44fe0e01cf49 SHA-1: c94f4780f1ba57c965d431a5a803abc0ac5066c4 SHA-256: 579b6bd73ae2ad4cb6813b2bd72fe1b77328c43aea8478fffa4c8772c4a38ab8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious infrastructure hosting game hack lures. The document body, though heavily obfuscated, contains references to 'Coin Master Free Spins' and includes URLs that are part of a known redirector chain. The primary intent appears to be directing users to potentially malicious websites through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-today-game-hack In PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/free-robux-codes-2021-not-used_GM431946152.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_003_off00004b2b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B2B 25340 bytes
SHA-256: 57b2af22c62d344d9bb18752b555f17a45416aaaa15a935e6547fcc8bb826a32
font_01_sfnt_off000082fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82FD 18412 bytes
SHA-256: ee277532c3187caf3da016130e4cbd3fee848ac0b1174d0f40fc16c12ed3c41d

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