Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee149c317d6b777…

MALICIOUS

PDF

35.3 KB Created: 2021-06-18 14:27:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 70fd4035cf3c2636d2ba8dc1ea993096 SHA-1: 309411828b3475608efc2c742688bfa0346a18e3 SHA-256: 3ee149c317d6b7775d4c0264031d85a646e33ddaa849432ea48d6580968df6ee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/nuke-hack-roblox-game-hack. The document body and heuristics indicate a lure for free game hacks or currency, designed to trick users into clicking the malicious link. The ML classifier strongly supports the malicious nature of this PDF.

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/nuke-hack-roblox-game-hack In PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/free-roblox-groups_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/village-4-coin-master_GM406889139.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/roblox-games-free_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/optifine-mcpe_GM479516143.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/hack-robux_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/roblox-jailbreak-hack-com_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/free-robux-no-scam-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/google-how-do-you-get-free-robux_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
font_00_sfnt_off0000333d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x333D 22576 bytes
SHA-256: a9e43910136f3f5272eccc827e7dd7a648f8834836e22e68632d6c8434aa3fd5
font_01_sfnt_off000065bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BD 18796 bytes
SHA-256: 89f7cdec0bcd7b65f42286910d84656b1834991d7a1287f7b84c5b358efdc096

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