Malicious PDF — malware analysis report

Static analysis result for SHA-256 de740ecf767fbf23…

MALICIOUS

PDF

36.5 KB Created: 2021-06-26 20:38:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 429cfcfd56b5f98983b0537722335820 SHA-1: a48de793af4c4617079e9f0b1db3eb551ef7776b SHA-256: de740ecf767fbf230eba6efcaa1740b93b68b6b4df6911118776f0fbc4e4a9da
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to websites offering game hacks and generators, specifically mentioning Roblox and Coin Master. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that these links point to known malicious redirector infrastructure. The document body, though partially obfuscated, contains similar lure text and URLs, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/what-do-you-do-if-your-roblox-account-gets-hacked-game-hack In PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/cheat-code-roblox-pc_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/pubg-uc-key_GM1330123889.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/t-shirt-roblox-free-survete-addidas_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/www-coin-master_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/pubg-uc-94fbr_GM1330123889.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/robux-free-com_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/freerobux-co_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-hack-zombie-attack-roblox_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32EB 23228 bytes
SHA-256: d50cf2d304b2bde49c5e91d46c483395ba298769887322c7f0681bf2659f9426
font_01_sfnt_off0000676c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x676C 19768 bytes
SHA-256: 051bf0b57d59e1c58c5ebe5cc44287b40e6cda23e6e25b87045359ab021b4aba

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