Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a80a603d8a5dfbf…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 18:30:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3936bf2f3e069c6a8bf6e4cac4085fde SHA-1: 8e627b5ea7951b4664880432eed6c1cacb8aef95 SHA-256: 6a80a603d8a5dfbf4482603d4ab2618d8d91ca3f6319aa1072931115af5ac375
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/431946152/free-robux-hack-game-hack PDF link annotation
    • http://stitqi.ac.id/website//repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-hack-any-roblox-game-2021_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/pokemon-go-free-team-medallion_GM1094591345.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/100-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-free-spins-2021-link_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
font_00_sfnt_off00002da7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA7 22160 bytes
SHA-256: cf8bfae8d6edefdc9721cb1814182401ba57eb16d10f3ff6beed707faa3b8dc3
font_01_sfnt_off00005e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9F 18884 bytes
SHA-256: dc79040e010cad5ef573560dd0163568f4a40b7ac77bac9f212c194fdd2f4c7b

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