Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b5b1a3d295012e5…

MALICIOUS

PDF

34.5 KB Created: 2021-06-27 08:51:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0810654ffecf59e9f34bf46c62ed4d00 SHA-1: b5cd624c688f128f8cd5ceee467e3d9a4838ed36 SHA-256: 9b5b1a3d295012e5531471bc7e5bdcbcfb4a3be3cc999d9610829da3892edf84
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector. The document body and embedded URLs reinforce this lure, specifically mentioning 'Free Gift Card Codes Facebook Roblox' and various game hacks. The primary IOC is the malicious URL, which is likely used to deliver a second-stage payload or phish user credentials.

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/free-gift-card-codes-facebook-roblox-game-hack PDF link annotation
    • https://www.advancissurgical.com/uploads/files/files/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/rbx-free_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/speed-hack-tool-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/before-dawn-hack-roblox-pastbin_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/creepy-free-roblox-t-shirts_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/robux-money-for-free_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-by-imaddi_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_off00002f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2A 22496 bytes
SHA-256: 8c00aaf43c61ecce37c46384ba091eabe89abf4abaffb4fcc2c9a26c8708411f
font_01_sfnt_off00006124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6124 19220 bytes
SHA-256: ebfbcdfdc5913d41df36ded1b71462e05db69d38a566e620794ac45824e5f152