Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6db1b91995a0e8f…

MALICIOUS

PDF

33.3 KB Created: 2021-07-03 16:04:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ec88ce825612270795005a4e9a0575e0 SHA-1: 3106324ff6b76baf1dfffb34b74dd85f980eb26f SHA-256: c6db1b91995a0e8f6c32f91eed8cb963cc34cc4cc28482b5b1b59825637e5de7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure of free game items and hacks to entice users to click on links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts further malicious PDF documents. The ML classifier strongly indicated maliciousness, and the document's structure and embedded URLs align with common phishing and redirection schemes.

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/479516143/free-minecraft-skins-pc-game-hack In PDF document text
    • http://pustaka.bbppketindan.info/repository/google-only-roblox-items-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-roblox-robux-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coun-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-cheats-free_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-10m-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/pastebin-com-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-roblox-robux-codes-for-roux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/is-pokemon-go-free-on-ipad_GM1094591345.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/easy-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-hack-roblox-go-through-walls-with-shift-lock_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/draw-it-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-robux-generator-hack-no-survey_GM431946152.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
font_00_sfnt_off0000301c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x301C 21784 bytes
SHA-256: 6676f8724f27cad891cbef81280a5e07a1e7ece9068d73b73029196d2cffc697
font_01_sfnt_off00005fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBE 18180 bytes
SHA-256: 03bbaca276f4ce07c12aa831bba89cfcc4ebeeef430a8e21d06434038c5cc938

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