Malicious PDF — malware analysis report

Static analysis result for SHA-256 0688a86dee147de2…

MALICIOUS

PDF

34.2 KB Created: 2021-06-22 07:21:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: cf9615d4254286dcddd6c3805ca498e3 SHA-1: e011f5ab8085ca0a1f5be43ba5710fdf5edf68da SHA-256: 0688a86dee147de27a334871e75613d11f9d7f87c0fe2baed597366c8ce10fa0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on offers for free game items or hacks. One primary link, http://netcdn.co/app/431946152/free-headset-in-roblox-game-hack, redirects to known malicious infrastructure. The document body and heuristics indicate a social engineering tactic to drive users to potentially malicious websites, likely for credential harvesting or further malware delivery.

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-headset-in-roblox-game-hack In PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/combo-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/coin-master-hack-progamers_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/tiktokexe-free-download_GM835599320.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/how-to-get-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/roblox-games-that-actually-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/robux-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_off00002fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCB 22068 bytes
SHA-256: 4de541daf9725482b490035a915840a9ac9cff62ce2f1a02f4765dd6bfc55746
font_01_sfnt_off000060ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60CA 18928 bytes
SHA-256: cba6027ba0cfceea07f428073e4968a06525f2a3d6e31eaa7293530bb315fb7f

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