Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d9671b33f99a469…

MALICIOUS

PDF

32.4 KB Created: 2021-07-22 14:35:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 638808f0b882940950836537f8d269e9 SHA-1: c01d29da712aaad16625c4308df938034ec0094c SHA-256: 8d9671b33f99a469e35efd02c98ace81fffd167b84f0ff100df2edd46273dfc1
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 0.9900

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/479516143/free-minecraft-accounts-reddit-game-hack PDF link annotation
    • http://acp-institut.fr/images/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://acp-institut.fr/images/free-tiktok-likes-no-survey_GM835599320.pdfIn PDF document text
    • http://acp-institut.fr/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://acp-institut.fr/images/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://acp-institut.fr/images/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://acp-institut.fr/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://acp-institut.fr/images/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://acp-institut.fr/images/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://acp-institut.fr/images/how-to-hack-roblox-accounts-2021_GM431946152.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_off00002c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C4E 22188 bytes
SHA-256: 1c77b7b51ce5056755effa3aa94252bb90511e09cc7f780363d3949d0f5a03b1
font_01_sfnt_off00005d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8D 18024 bytes
SHA-256: 8cc2f99dc924a15d52918b37ec4a77595277c9fc296e6ac0964170e61a15a16b

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