Malicious PDF — malware analysis report

Static analysis result for SHA-256 97ae138548f44e93…

MALICIOUS

PDF

53.7 KB Created: 2021-06-09 04:20:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f6610d8e76cff4f591f705913cee87b4 SHA-1: 85be034414b6097644daa790a1ce8fb4b89c18f5 SHA-256: 97ae138548f44e9301b697bb40d9878b2e69f97a2effd9434ddce39ff7b2845b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9636

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://netcdn.tw/app/431946152/download-hack-robux-2021-game-hack PDF link annotation
    • http://library.umuslim.ac.id//repository/roblox-redeem_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-imagine_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/tiktok-free-followers-apk_GM835599320.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52A7 36440 bytes
SHA-256: 135ef06d980cffcd00e38b60b4a92e84c6f17750fd1f6491e5d7f4f24785cb1f
font_01_sfnt_off0000a288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA288 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off0000ac85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC85 19228 bytes
SHA-256: bfd494363ac517695a2803507bd84c20067445c78946e21a6906043ae7f5711b

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