Malicious PDF — malware analysis report

Static analysis result for SHA-256 772be45ae3460868…

MALICIOUS

PDF

34.6 KB Created: 2021-06-26 16:02:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dfeb6c36133b48299ecf3b5d4301d460 SHA-1: 2252ab5c892e36db618acb053b0289fd7b88623c SHA-256: 772be45ae3460868007fba081ca5b654dec47ead15ec158d822fb074ced48e95
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.co/app/431946152/roblox-bucks-hack-game-hack PDF link annotation
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/free-roblox-money-no-survey_GM431946152.pdfIn PDF document text
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/secret-youtuber-dantdm-gives-promocodes-working-free-robux_GM431946152.pdfIn PDF document text
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/free-roblox-redeem-cards-28-5-2021_GM431946152.pdfIn PDF document text
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/free-accounts-that-have-robux_GM431946152.pdfIn PDF document text
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/free-robux-codes-2021-august_GM431946152.pdfIn PDF document text
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/codes-for-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/free-groups-with-funds-roblox_GM431946152.pdfIn PDF document text
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-2021-july_GM431946152.pdfIn PDF document text
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/pokeballs-in-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.cityonlinestores.com/uploaded_files/userfiles/files/card-hack-for-coin-master_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_off00003150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3150 22276 bytes
SHA-256: f18fad30fbdad1ee33ec0c901ddaa7bf0e35896b92c2a0437354e28dcb727ab2
font_01_sfnt_off000062c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C4 18796 bytes
SHA-256: cd859399c901611910809cd5eaed62a849a09d57a458a3ccdfec721523f9d314

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