Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee74055dedcba3b…

MALICIOUS

PDF

33.1 KB Created: 2021-07-03 19:23:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b6bf54735779becd8e18df085b2eca64 SHA-1: 6444eeb4e542d5712d6e3e92f3ff9c924439391b SHA-256: 9ee74055dedcba3b1325fd9bb241ab286732bd02969959843bd27082b644f23d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free Robux' and game hacks. The document body and heuristics confirm a lure-based attack pattern designed to trick users into visiting these malicious sites. Although no scripts were extracted, the embedded URLs and the nature of the lure strongly suggest a phishing or scam campaign.

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/431946152/rbx-roblox-robux-game-hack In PDF document text
    • http://www.dhs.or.id/new/public/ckfinder/userfiles/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://dhs.or.id/new/public/ckfinder/userfiles/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://dhs.or.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • http://www.dhs.or.id/new/public/ckfinder/userfiles/files/generator-hack-roblox-online-pc_GM431946152.pdfIn PDF document text
    • http://dhs.or.id/new/public/ckfinder/userfiles/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://www.dhs.or.id/new/public/ckfinder/userfiles/files/roblox-aesthetic-outfits-free_GM431946152.pdfIn PDF document text
    • http://dhs.or.id/new/public/ckfinder/userfiles/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://www.dhs.or.id/new/public/ckfinder/userfiles/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.dhs.or.id/new/public/ckfinder/userfiles/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://dhs.or.id/new/public/ckfinder/userfiles/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://dhs.or.id/new/public/ckfinder/userfiles/files/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://dhs.or.id/new/public/ckfinder/userfiles/files/caught-my-mom-cheating-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.dhs.or.id/new/public/ckfinder/userfiles/files/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://www.dhs.or.id/new/public/ckfinder/userfiles/files/roblox-flood-escape-2-hacks_GM431946152.pdfIn PDF document text
    • http://dhs.or.id/new/public/ckfinder/userfiles/files/free-roblox-stuff-hood_GM431946152.pdfIn PDF document text
    • http://www.dhs.or.id/new/public/ckfinder/userfiles/files/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • http://www.dhs.or.id/new/public/ckfinder/userfiles/files/fray-roblox-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://dhs.or.id/new/public/ckfinder/userfiles/files/free-robux-sin-vertificacion_GM431946152.pdfIn PDF document text
    • http://dhs.or.id/new/public/ckfinder/userfiles/files/free-robux-works-no-surveys-no-human-verification-code_GM431946152.pdfIn PDF document text
    • http://www.dhs.or.id/new/public/ckfinder/userfiles/files/rbx-com_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_off00002d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D6F 21816 bytes
SHA-256: 42e50b6e6b764951243bf23f80ffa4db4c27ea464922cd98a4e7c4456b4547f8
font_01_sfnt_off00005d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D83 18628 bytes
SHA-256: fc8477d287bc75180d007451741119beea25bfc07268422a1f9cf6fe335c9d46

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