Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb46c17527e86005…

MALICIOUS

PDF

42.3 KB Created: 2021-05-15 17:10:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a0d90672ee370755f3b643ce04bbd8ba SHA-1: 9703a3e9ba1709c8d11166ca57e774f075d35bf8 SHA-256: fb46c17527e86005ecff993faa64918e5cc1efe2bcf5bf71ed48d1db8d9433c7
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-link-2021-game-hack PDF link annotation
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/how-to-get-free-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/free-roblox-acc_GM431946152.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/como-descargar-coin-master-hackeado_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_off00004a0e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A0E 26424 bytes
SHA-256: 6a3b4fdb7c9924d77dfee984d9db1c28cf914db3b7bd6b6a0cf312118d52fb08
font_01_sfnt_off0000830e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x830E 18284 bytes
SHA-256: be459003f2db1a934c49859962f2962ce704e042ee0985c73311b64c11e09449

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