Malicious PDF — malware analysis report

Static analysis result for SHA-256 685c311911bfae33…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 16:58:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a38f08ad20a066e580defca33b58a198 SHA-1: 993b38e532e8a8fe5b13519a975a40910ac5e54a SHA-256: 685c311911bfae33e9c18ee6df48fb3c63b99c98767f743dd6cdf6770801340b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and lures users with 'free generator / game hack' content. The primary link, http://netcdn.tw/app/406889139/free-coin-and-spin-link-game-hack, is identified as a malicious redirector. The document's structure and embedded URLs suggest an attempt to trick users into visiting malicious sites, likely for phishing or malware distribution.

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/free-coin-and-spin-link-game-hack In PDF document text
    • http://opac.stiesa.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-free-ply-no-download_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-random-roblox-accounts-without-anything_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-hack-no-human-verification-or-survey_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
stream_002_off00002daf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DAF 23060 bytes
SHA-256: 43c97c0e927c0980ddf28391b0b455f3d520c96f804bc49d21ac641abaa4a674
font_01_sfnt_off0000619f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619F 18412 bytes
SHA-256: 2ba87999f412b34b7b045db27ef71f7741e94ad18d1cd31c0de9f112f358b237

Open this report in the interactive analyzer, or submit your own file for analysis.