Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad4700259e728f7…

MALICIOUS

PDF

43.2 KB Created: 2021-05-19 08:37:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: bbc1b3345d2d91374b4ebd6561a66bd7 SHA-1: af7fda026631ad16e57fcbf23eea91a24d89cb60 SHA-256: 8ad4700259e728f7adc3bbd2093eac7a1900a4bc048a344c27f216e4b59d3630
122 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 0.9969

Heuristics 5

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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/1094591345/pokemon-go-free-play-online-without-downloading-game-hack PDF link annotation
    • http://www.fluidtech.hu/images/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/roblox-top_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coinmaster-com_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-free-spins-link-download-free_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_off00004967.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4967 24756 bytes
SHA-256: c600fbe4820696d446742427e4972f40d1b5df8b482801e0b2d39ef41330ba3c
font_01_sfnt_off0000820a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x820A 19848 bytes
SHA-256: ba8c2efbd4fe729e68661c8ab1a99ca76bd76d5f97c2cf1fd89f6f2b5c1d7664

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