Malicious PDF — malware analysis report

Static analysis result for SHA-256 3781914cfb4f677f…

MALICIOUS

PDF

34.9 KB Created: 2021-06-18 21:54:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b00b96aa2ecd76ea0ec27d95c83690cb SHA-1: ec396c85efb75b01b84d8a0e03306a6dfd385411 SHA-256: 3781914cfb4f677f3796ef95f23735b3d26cb4bb018e500a2c79f93d1b9f5e72
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency or hacks to entice users. It contains multiple links, including one to a known malicious redirector at http://netcdn.co/app/431946152/free-robux-nunchucks-free-robux-game-hack. The document's structure and embedded links suggest it is designed to lead users to potentially malicious websites, likely for credential harvesting or malware distribution.

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/free-robux-nunchucks-free-robux-game-hack In PDF document text
    • http://www.ocic.hr/files/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.ocic.hr/files/make-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/nike-roblox-shirt-free_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/how-to-hack-roblox-pokemon-brick-bronze_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • https://www.ocic.hr/files/pubg-uc_GM1330123889.pdfIn PDF document text
    • https://www.ocic.hr/files/how-to-hack-plates-of-fate-roblox_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/minecraft-items_GM479516143.pdfIn PDF document text
    • http://www.ocic.hr/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/i-need-more-free-spins-on-coin-master_GM406889139.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_off000030c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C8 22648 bytes
SHA-256: 9d7a5ed46f2a6e73646303aa52adcb3b4a60ca1126d3056c78873fe3b2d9fddc
font_01_sfnt_off00006375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6375 19052 bytes
SHA-256: 060b7b2a84220b5ab57b6a717681778bd9a789e3139abb953721f22a75d6553b

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