Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa19c380f34a2ab8…

MALICIOUS

PDF

42.0 KB Created: 2021-05-14 12:43:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 489d402123cc1e94d44a37e6ee0262b2 SHA-1: d6d2a6e7f00930a4324910006b1480374baa70cb SHA-256: fa19c380f34a2ab80244b8c86dc11f72efeca5e8a57bba1319bb8d6d6f9d29a0
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/431946152/cool-free-roblox-outfits-game-hack PDF link annotation
    • https://www.ncscolour.no/images/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ncscolour.no/images/dailyrobux_GM431946152.pdfIn PDF document text
    • https://www.ncscolour.no/images/robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.ncscolour.no/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://www.ncscolour.no/images/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.ncscolour.no/images/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • https://www.ncscolour.no/images/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://www.ncscolour.no/images/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • https://www.ncscolour.no/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.ncscolour.no/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://www.ncscolour.no/images/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://www.ncscolour.no/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.ncscolour.no/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.ncscolour.no/images/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://www.ncscolour.no/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://www.ncscolour.no/images/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • https://www.ncscolour.no/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.ncscolour.no/images/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • https://www.ncscolour.no/images/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • https://www.ncscolour.no/images/best-roblox-hacks_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_off0000482d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x482D 25228 bytes
SHA-256: 1a26fb7a49fcfeb180df5e3c85e41e4a31b4cd69d9a4778fa71e918f6e63f443
font_01_sfnt_off000081c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C4 18312 bytes
SHA-256: 417c7b24102dcc08af0a4c58268c6a25298d4645c7c37a471affeae5ac7401c6