Malicious PDF — malware analysis report

Static analysis result for SHA-256 335a405aa5858e04…

MALICIOUS

PDF

42.3 KB Created: 2021-05-17 09:50:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3da883d8ea6e30ce0f6288bf00efdef7 SHA-1: ec4c2db831a87272c20c03d792513a0e8f27722a SHA-256: 335a405aa5858e0451eff595c1261368d30707e7d338e0e656d84039777dd9bf
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on game hack generators and free spin offers. The primary lure directs to a URL that appears to be a redirector, while a significant number of other links point to a PDF link farm hosted on thehancgroup.com, suggesting a coordinated effort to drive traffic. No scripts were extracted, but the PDF structure and heuristics indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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/free-daily-spins-coin-master-2021-game-hack PDF link annotation
    • http://thehancgroup.com/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://thehancgroup.com/images/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://thehancgroup.com/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://thehancgroup.com/images/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • http://thehancgroup.com/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://thehancgroup.com/images/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://thehancgroup.com/images/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://thehancgroup.com/images/coin-master-hack-apk-ios-download_GM406889139.pdfIn PDF document text
    • http://thehancgroup.com/images/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://thehancgroup.com/images/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • http://thehancgroup.com/images/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://thehancgroup.com/images/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • http://thehancgroup.com/images/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://thehancgroup.com/images/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://thehancgroup.com/images/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://thehancgroup.com/images/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://thehancgroup.com/images/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://thehancgroup.com/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://thehancgroup.com/images/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • http://thehancgroup.com/images/free-robux-gift-card-generator_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_off00004983.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4983 24552 bytes
SHA-256: 621e3e20edd966d74c1d9dd71b006284db5d78e82a39cb7c0b329eb0426a81fa
font_01_sfnt_off000081c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C4 18708 bytes
SHA-256: c65851a3c2ccf8ba249fbb480ab00bab2dc65c52c70fe6f18183c59a9b34b022

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