Malicious PDF — malware analysis report

Static analysis result for SHA-256 32dda41dc0b43b03…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 04:11:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2df59e2ef933c8428270e3ed10b3d1ad SHA-1: ae84f646856bc13da4b88e17b018b0cd1b0c6c2c SHA-256: 32dda41dc0b43b031e68bee848dad36fa4a4f4454f462b268f3b1462125f9db4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for free in-game currency, specifically 'Robux', which is a common tactic for phishing and scamming. The document includes a direct link to a redirector hosted on 'netcdn.tw', which is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest it's designed to lead the user to a malicious website, potentially for credential harvesting or further malware delivery.

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/get-free-robux-without-doing-anything-game-hack In PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/youtube-how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/comment-cheat-sur-tower-battles-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/cheat-engine-roblox-2021_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/roblox-hack-generate-99-999-robux_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/roblox-cheats-to-get-2021-robux-2021_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/free-robux-meep-city_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-2021-legit-on-pc_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/pastebin-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/games-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-a-person-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/roblox-online-game-free-play_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/free-robux-no-download-no-password_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_off00003317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3317 22284 bytes
SHA-256: 735486200cfb52060ec8324b21cff9fa8cdc5909cbd8ed6d4fa3d978cc2a91d6
font_01_sfnt_off00006485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6485 19652 bytes
SHA-256: d01fab7bff865e1e572a69531771b19011470ec9dd60cfeb54f37c62aa9fdbeb

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