Malicious PDF — malware analysis report

Static analysis result for SHA-256 40054b9a4b1b8739…

MALICIOUS

PDF

46.6 KB Created: 2021-06-11 12:41:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 89af09eabdeefe032c9b7243203ebb06 SHA-1: 1a9164e68d11cae238c856200af52fdd404d29eb SHA-256: 40054b9a4b1b87395873f203b3aea963c505cfe881d82de4978284a7d8adf84e
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 0.9832

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/roblox-hacks-download-ofr-pc-game-hack PDF link annotation
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/roblox-how-to-get-any-face-for-free_GM431946152.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/robux-giver_GM431946152.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

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
stream_004_off000054f7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54F7 27276 bytes
SHA-256: c07933b7c76635a9bed0feeb0ae852b6c08db41fd4b4333cc61229bf0205757e
font_01_sfnt_off000091b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91B2 18844 bytes
SHA-256: 0a4f2676b41dd4bafcc7e3790bd4fad7004ba50f856fd65b4979b0b0ace50c88

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