Malicious PDF — malware analysis report

Static analysis result for SHA-256 6702fd12dc56c530…

MALICIOUS

PDF

36.0 KB Created: 2021-06-22 08:41:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 77582a1c0f8f1e8a131d0912c91c9de0 SHA-1: fa4ee5f8cb7508d47f9851d590fda30b04e62396 SHA-256: 6702fd12dc56c53031e21eb2512f07067318d7ac226efe7d690afe5937a7ed04
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.co/app/431946152/free-robux-human-verification-game-hack PDF link annotation
    • https://mtsn4blitar.online/__statics/gudangsoal/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/pig-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/hack-coin-master-no-verification_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_off00003633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3633 22116 bytes
SHA-256: 056bed82e218375f55f855d128837a47bcfc8affd17010fdc07ed72b8cd06088
font_01_sfnt_off000066fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66FC 19336 bytes
SHA-256: 92143470d310579c388343173be6cd05412756600998301cf9713c298b7be504