Malicious PDF — malware analysis report

Static analysis result for SHA-256 39fb6e975e2ad337…

MALICIOUS

PDF

45.6 KB Created: 2021-06-11 01:58:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b7dccfda0fb578c1c5302bcb6095182a SHA-1: 51d36735915fa5ae6937e4e31599ec25073ea068 SHA-256: 39fb6e975e2ad33770b6508fcbdb7394048d502845c45132ca645e2b5f7c5502
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators' for popular games. The heuristic firings confirm these links point to known malicious redirectors and a general lure for game-related cheats. While no scripts were explicitly extracted, the nature of PDF redirection often involves JavaScript to facilitate the chain of malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/jhow-to-hack-roblox-accounts-game-hack In PDF document text
    • http://mebliok.com.ua/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://mebliok.com.ua/images/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • http://mebliok.com.ua/images/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://mebliok.com.ua/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://mebliok.com.ua/images/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://mebliok.com.ua/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://mebliok.com.ua/images/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://mebliok.com.ua/images/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://mebliok.com.ua/images/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://mebliok.com.ua/images/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://mebliok.com.ua/images/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://mebliok.com.ua/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://mebliok.com.ua/images/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • http://mebliok.com.ua/images/robux-recharge-hack_GM431946152.pdfIn PDF document text
    • http://mebliok.com.ua/images/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://mebliok.com.ua/images/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://mebliok.com.ua/images/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://mebliok.com.ua/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://mebliok.com.ua/images/knife-hack-roblox_GM431946152.pdfIn PDF document text
    • http://mebliok.com.ua/images/roblox-free-wings_GM431946152.pdfIn PDF document text
    • https://www.nrzroblox.comIn 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_off0000520a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x520A 26440 bytes
SHA-256: 0a6e9faad1c3deb07c610e50a39a4e4ba906f0ffd5f1e28c44e38bc8be8aa83e
font_01_sfnt_off00008d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D90 18920 bytes
SHA-256: 970886adeda9d7274323fe06e9676670d38de5059ff3b11e896192da5f572cb4

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