Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ab86f5d153bf95…

MALICIOUS

PDF

42.0 KB Created: 2021-05-15 04:01:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b976dd0bad6ff4ce3a643553ae59a085 SHA-1: 6e407a1fd24daa0f4c313ac69d62fc32c3fd91f9 SHA-256: 36ab86f5d153bf95556f366153bfe12c2f06a8a41d771a783675d3022ab517fa
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/how-to-hack-coin-master-computer-game-hack PDF link annotation
    • http://atmos-service.com/images/getrobux-ninja_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • http://atmos-service.com/images/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/roblox-free-followers_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://atmos-service.com/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/coin-master-free-box_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://atmos-service.com/images/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/old-roblox-accounts-for-free_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
stream_003_off000048e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E2 25196 bytes
SHA-256: d4ab2196886581e386da96a9d5ce61286077eed8793987839c7700bc988d1372
font_01_sfnt_off00008176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8176 18456 bytes
SHA-256: 0b5be2213ccbf3434597132f1910edc539f1187ea0f6416cb04f1f902ec4d5b3

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