Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c4fe2bcde193854…

MALICIOUS

PDF

35.8 KB Created: 2021-07-08 07:39:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 2aff6707dbb3e9faac8a749115205b3c SHA-1: d973de8950beca32ecfc2eb409fcd9dd67c40a5c SHA-256: 8c4fe2bcde1938542a0a478b53599b1a9ebd44565d3f4731a56b41bf5f7e7d46
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 0.9980

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 http://netcdn.tw/app/406889139/apk-hack-coin-master-game-hack PDF link annotation
    • https://financia-business-school.com/static/upload/files/how-to-use-the-sex-hack-on-roblox_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/how-to-robux_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/increible-hack-robux-pastebincom-80b1sjzp-davidtoasa_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/cpbildco-robux_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/deadly-sins-retribution-release-script-roblox-hack_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/roblox-character-boy-free_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/robux-hack-in-game_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/how-to-get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-free-spins-link-no-verification_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/spin-coin-master-hack_GM406889139.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_off000035dc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35DC 23064 bytes
SHA-256: 7dbc6d114eda24b2df521d1e8e0e7e0d2aa0d4c06e473ac8d929ddc190af05f2
font_01_sfnt_off000069ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69CE 18180 bytes
SHA-256: bbc4eac059efcf8bf1e74c2581f3a6bb8c6757dc141f09cf3b32e8008e1b5aa4

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