Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4dcf9e709f48e40…

MALICIOUS

PDF

51.4 KB Created: 2021-06-02 17:54:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4f35a73f163ff9b4bdefa0ba6127697c SHA-1: 19595571a5554765c266381342acfcf6aff0f158 SHA-256: a4dcf9e709f48e40fe8835f43fec86e288490f1f850de3ce13549cb001054271
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 0.9724

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.xyz/app/431946152/grow-robux-hack-game-hack PDF link annotation
    • http://www.copoint.co.uk/images/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/roblox-free-body_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000529f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x529F 31332 bytes
SHA-256: 97192241b57af642783d556f1b0627f81ab28dd17184c96a683e08e18cc413b2
font_01_sfnt_off00009be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE7 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000a5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5D2 18412 bytes
SHA-256: d58db5b6ce09f081801a5d825066b02e61b3e44913a1bb4b1babc93c676f0260

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