Malicious PDF — malware analysis report

Static analysis result for SHA-256 37686ec6123f2730…

MALICIOUS

PDF

42.9 KB Created: 2021-05-13 19:42:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e9a25f03e4d9cfd94c7eed5fb893014c SHA-1: 16c088efb080e7289bbaf757f2cf3fa1dd8a1f05 SHA-256: 37686ec6123f2730605fddfb28b12a9ce15bdc719c6cd26f602f80ffb4b4e8f0
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 0.9971

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/406889139/coin-master-free-coins-and-spins-daily-summary-game-hack PDF link annotation
    • http://fmbompastor.com.br/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/get-more-robux_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/hack-coin-master-download_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/spins-coin-master_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/blogspot-free-spins-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
stream_003_off00004b68.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B68 25288 bytes
SHA-256: b662af6b8dd2dc7993b24ace3f9012fec2c37b42a661ea9e1fff4e6f112c2211
font_01_sfnt_off000083c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C2 18880 bytes
SHA-256: 80e94ef00212ac5fe4220c165773dd6e8ea516dcb328b8ee80116dae5b806def

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