Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a50b459a9aed11…

MALICIOUS

PDF

49.8 KB Created: 2021-06-03 08:07:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 867b4339568a8b5ed03c4cc1bacdbd8d SHA-1: 68de88cd40ea8aa8b7867099d8e38793c55b7c92 SHA-256: e2a50b459a9aed11c0b3c16f2b113166b0774ae32272cfa1841c3b76cce5fa4e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "game hacks" or "free generators" to lure users. The document body and embedded URLs suggest a phishing or scam attempt, likely to lead users to further malicious content or downloads. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/431946152/hawt-sauce-roblox-jailbreak-hack-game-hack In PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/tiktok-free-views_GM835599320.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005243.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5243 28108 bytes
SHA-256: 8de1ef1d338570a72397523862eb0d9cd19eff800423abde7207d12dfeb2fca8
font_01_sfnt_off0000947c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x947C 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off00009e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E3E 18876 bytes
SHA-256: ceada1fc572a83317c929f585cd310b531a4470fabe5672fb825b7e15f144e2b

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