Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5290e6233bbe3c8…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 23:34:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e37007c76a59fcd92a4f02fe17466d06 SHA-1: 7aa91c033fe39c08cf4bf236428c82d46aa7d050 SHA-256: b5290e6233bbe3c8360876d3a0e77235bacfe6e05b9911ed32fabfabc4663d1b
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/mcpe-master-coin-hack-apk-game-hack PDF link annotation
    • http://stiepariperpus.web.id/sarjana/repository/free-robux-code-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/copy-and-paste-for-free-gears-on-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-do-i-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-wings-on-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-hats-for-free-no-inspect-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/pokemon-go-free-roam_GM1094591345.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/hack-roblox-cs-go-2021_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-wall-hack-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-hack-in-roblox-and-be-dantdm_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/blogspot-coin-master-spins_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_off000030d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30D3 23616 bytes
SHA-256: 8e9a64bb30f17ac023943be5475169d7fdd1372554637f6640409f77a8d29b93
font_01_sfnt_off00006689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6689 18180 bytes
SHA-256: a4b029fe06f847910f4f73310ba83e3acfc8604b764c8cc50fdbf70b61a3fcde

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