Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea6b33709b7cedd…

MALICIOUS

PDF

38.0 KB Created: 2021-05-14 16:07:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8a1b7658242c7fd33394827ead547699 SHA-1: d7f70b5d622f2a941addd9be2fd1c57e2451036a SHA-256: 4ea6b33709b7cedd5c7bde92d56a65642dcc324c9086c3241955d7a51f33475e
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and multiple links that are flagged as malicious redirectors. The document body and linked URLs promote 'free generators' and 'hacks' for popular games, a common lure for phishing or malware distribution. The embedded JavaScript likely facilitates the redirection or exploits a vulnerability to execute further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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-daily-free-spins-link-today-game-hack In PDF document text
    • http://thehancgroup.com/images/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://thehancgroup.com/images/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://thehancgroup.com/images/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://thehancgroup.com/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://thehancgroup.com/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://thehancgroup.com/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://thehancgroup.com/images/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://thehancgroup.com/images/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://thehancgroup.com/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://thehancgroup.com/images/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://thehancgroup.com/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://thehancgroup.com/images/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://thehancgroup.com/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://thehancgroup.com/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://thehancgroup.com/images/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://thehancgroup.com/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://thehancgroup.com/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://thehancgroup.com/images/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • http://thehancgroup.com/images/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://thehancgroup.com/images/how-to-get-free-spins-on-coin-master-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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004853.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4853 24084 bytes
SHA-256: 9f1377b3969660b66a01bb4b48744ed96c72034a49d16e959b25a314cdcb58d7

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