Malicious PDF — malware analysis report

Static analysis result for SHA-256 3050e2b9c8265613…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 17:26:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 010d228e409dd65289b92a45db60d404 SHA-1: 6483facb822b298ae508b1f9556a891fdcc49720 SHA-256: 3050e2b9c82656135fdcedf7b01da53427b10a07dbf8d4a1311f47c80149154b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, masquerading as "game hacks" or "free generators". The primary lure directs users to http://netcdn.tw/app/406889139/coin-master-download-hack-ios-game-hack, which is flagged as malicious infrastructure. The document body text and embedded URLs reinforce this lure, aiming to trick users into downloading potentially harmful content. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or malware distribution attempt.

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/406889139/coin-master-download-hack-ios-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/best-free-roblox-stuff_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-spins-link-2021-app_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/descargar-roblox-hackeado-adopt-me-para-pc_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-generater-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-gift-card-codes-2021-feb_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-explorer-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/where-to-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/what-is-the-free-robux-code_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-accounts-not-used_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/tiktok-free-fire_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-villages_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-gg-codes-php_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-f3x-hacks-gui_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-tablet-cheats_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
font_00_sfnt_off00003141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3141 23120 bytes
SHA-256: 1bc25578ccfa4ba6cebdad308d242762757e3dba3e36ac5f06d81742d3a985f4
font_01_sfnt_off0000658b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658B 18584 bytes
SHA-256: 0cc53e6ff5965a6bde6e826f187bf2e09f3f61dfd66a91e989fd5a35dba691c6

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