Malicious PDF — malware analysis report

Static analysis result for SHA-256 5647b36bd8cc893a…

MALICIOUS

PDF

37.9 KB Created: 2021-07-04 17:52:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 085ff3a8cee5d69b5dbb2dd92b6210c5 SHA-1: 5886249e5697a7152d7b6c1832504d4acab90426 SHA-256: 5647b36bd8cc893aa59e986380b98ddbf7d44875c11b1d47868674c06f9f2fdf
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to suspicious URLs, including a known malicious redirector and an IP address. The document body and extracted links suggest a lure for game-related cheats and currency, which is a common tactic for phishing or malware distribution. The presence of these links indicates an attempt to redirect the user to potentially harmful content or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • 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.
  • 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/431946152/roblox-zone-free-robux-game-hack In PDF document text
    • http://118.98.227.172/opac/repository/roblox-re_GM431946152.pdfPDF link annotation
    • http://118.98.227.172/opac/repository/free-exotics-roblox-assassin_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/robux-cheats-2021_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/hacking-roblox-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-find-free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/aplicacion-para-hackear-roblox-i-tener-robux-infinitos_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/game-cheat-central-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/does-john-doe-hack-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-robux-hack-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-cheat-menu-2021_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/fastbucks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C10 23356 bytes
SHA-256: c73641395aa148559f13c4f416740b71dd5072d8252d0a3b1ba1fb8484886ccf
font_01_sfnt_off00007011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7011 18884 bytes
SHA-256: ee7a09e4b3f15cc364cad973da95635941027bcad42042fb3a1cc04549a97256

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