Malicious PDF — malware analysis report

Static analysis result for SHA-256 614bf31f33217a62…

MALICIOUS

PDF

34.2 KB Created: 2021-06-30 03:21:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 426e34adb3a331a6e8b0a5d27a12bf85 SHA-1: 75e3ef1f76e9aa2572a3011d777355a4d280351a SHA-256: 614bf31f33217a6222c98b9a4ba9deccea33d3d1fa4a31b0c23e6e86fbc8fa6e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that lead to known malicious redirectors, specifically promoting game hacks and cheats for popular games like Roblox and Coin Master. The ML classifier strongly indicated maliciousness, and the presence of a download button lure reinforces the deceptive nature of the document. The primary attack pattern involves tricking users into visiting these malicious sites, likely to deliver further malware or engage in phishing.

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/roblox-free-plane-game-hack In PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/coin-master-ad_GM406889139.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/roblox-download-free-windows_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/get-free-builders-club-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/hack-roblox-download-and-install-deutsch_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/how-to-cheat-tycoon-roblox_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/free-robux-summer-rewards_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/synapse-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/cheats-to-get-free-spins-on-coin-master_GM406889139.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
stream_002_off00002fd1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FD1 22364 bytes
SHA-256: 50393128e1e0c39c60229c041e9a30c351c8f0d296f64cbb676da2e1388fe2a6
font_01_sfnt_off00006191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6191 18804 bytes
SHA-256: 8f8dc508866b0661656a6b2ca5e187b3b10234d1b0caa9cf3eed6bd681b2b05a

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