Malicious PDF — malware analysis report

Static analysis result for SHA-256 39f325da7707599d…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 01:01:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 0a980e36e3fc6be5a6315f3757d23b00 SHA-1: 0f66f6d0668e3c0f541826144b987496c54d7aa1 SHA-256: 39f325da7707599d583c824cbc73e8386abc912bcd66ca803d4b6f966fe93e4d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious domain, likely as part of a phishing or scam campaign. The document body explicitly mentions 'free Robux' and 'game hack', reinforcing the lure. No scripts were extracted, but the presence of malicious redirector links and the lure content strongly suggest a phishing attempt to trick users into visiting compromised sites.

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.tw/app/431946152/codes-how-to-get-free-robux-game-hack In PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/free-robux-accounts-roblox_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/roblox-comment-metre-un-script-cheat_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/roblox-test-site-hack_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/robux-free-co_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/roblox-free-pictures_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/how-to-get-free-wins-at-roblox-got-talent_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/cruise-ship-tycoon-hack-roblox_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_off000031b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B5 22632 bytes
SHA-256: 4d04ee2d36a054110352a398aeda4e0caf9ba2647a057d209fa919f090a90d6b
font_01_sfnt_off0000644c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644C 19156 bytes
SHA-256: 1abe1f888ea44a86c9f7894949bd06bee09219bb3a2585bcc6d0e8e487c16c49

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