Malicious PDF — malware analysis report

Static analysis result for SHA-256 72bfa07c2a339e97…

MALICIOUS

PDF

35.2 KB Created: 2021-07-09 01:16:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-28
MD5: 93a8e751c9fa1440402cdfef6f32d09d SHA-1: d298160ee352a191100103570fd8f8fb820d8e1b SHA-256: 72bfa07c2a339e97609a166e0d9ba45d582580e126b78a700fe12c1fe1edd8b9
240 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/406889139/coin-master-200-spin-link-game-hack In PDF document text
    • http://110.164.163.187/ckfinder/userfiles/files/how-to-get-free-robux-no-scam_GM431946152.pdfPDF link annotation
    • http://110.164.163.187/ckfinder/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://110.164.163.187/ckfinder/userfiles/files/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://110.164.163.187/ckfinder/userfiles/files/roblox-auto-clicker-free_GM431946152.pdfIn PDF document text
    • http://110.164.163.187/ckfinder/userfiles/files/free-roblox-accounts-with-bc-2021_GM431946152.pdfIn PDF document text
    • http://110.164.163.187/ckfinder/userfiles/files/ww-roblox-come_GM431946152.pdfIn PDF document text
    • http://110.164.163.187/ckfinder/userfiles/files/coin-master-free-spins-no-generator_GM406889139.pdfIn PDF document text
    • http://110.164.163.187/ckfinder/userfiles/files/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • http://110.164.163.187/ckfinder/userfiles/files/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://110.164.163.187/ckfinder/userfiles/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://110.164.163.187/ckfinder/userfiles/files/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • http://110.164.163.187/ckfinder/userfiles/files/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • http://110.164.163.187/ckfinder/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://110.164.163.187/ckfinder/userfiles/files/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • http://110.164.163.187/ckfinder/userfiles/files/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://110.164.163.187/ckfinder/userfiles/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://110.164.163.187/ckfinder/userfiles/files/how-to-get-free-robux-form-inspect_GM431946152.pdfIn PDF document text
    • http://110.164.163.187/ckfinder/userfiles/files/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://110.164.163.187/ckfinder/userfiles/files/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://110.164.163.187/ckfinder/userfiles/files/is-free-robux-real_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
stream_002_off00003243.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3243 23064 bytes
SHA-256: 4954e540e7a9a0876fd70df051a6d9938996f9844c7e1fdd51ff0968973a76eb
font_01_sfnt_off00006620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6620 18476 bytes
SHA-256: 9b5d28b427ac6d3fd2581d21508ddbe335b0d7ca2b3b27afa1e62d89566a4b6f

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