Malicious PDF — malware analysis report

Static analysis result for SHA-256 866f41b5f158390b…

MALICIOUS

PDF

35.6 KB Created: 2021-06-23 07:43:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 24aa0fa85379cf6dc247658e22a73b43 SHA-1: b509034bc2c651d71a44e6c2937806e5960affef SHA-256: 866f41b5f158390b088851bd5e3b72470b0230df38471a3e81adb2e646a427d5
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to websites that appear to be part of a link farm designed to lure users with promises of free in-game items. These links redirect to other pages, including one hosted on 'netcdn.co' which is flagged as a malicious redirector. The document's structure and content strongly suggest a phishing or scam attempt to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • 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.
  • 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/how-to-get-free-money-in-the-plaza-roblox-game-hack In PDF document text
    • http://sttlets.education/senayan/repository/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/all-ways-to-use-cheat-engine-in-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/robux-money_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-hack-to-get-a-password-on-roblox-account_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/robux-hack-apk-download-without-generator_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/are-robux-generators-safe_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/cheat-cs-go-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/www-roblox-com-free-items_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/code-cheat-roblox-to-chat_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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
font_00_sfnt_off000032db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32DB 22260 bytes
SHA-256: a57b9e1591c983fc2ae41722e5771f03074c9ee6dffcdfd1105ce2134ccac680
font_01_sfnt_off0000643b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643B 19696 bytes
SHA-256: 12a986a7b5d6ab8406f51a039b399d637a3ace40089c6e38f0f495a98636eaa8

Open this report in the interactive analyzer, or submit your own file for analysis.