Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1e6aa74bc208bbb…

MALICIOUS

PDF

34.1 KB Created: 2021-05-11 09:02:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a6887d0b7d3a6bfd5c3acc3275e64921 SHA-1: 9333a8164b7deee1b97f20d0aefdda8ae17600d5 SHA-256: d1e6aa74bc208bbb05ae29980024d0e11da54febc0105483d761f5ba88a6957c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains, masquerading as generators for game currency and hacks. The primary lure is 'free Roblox accounts with Robux', directing users to a malicious URL. The ML classifier strongly indicates maliciousness, and the embedded links are flagged as malicious redirectors, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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/free-roblox-accounts-with-robux-that-work-not-banned-2021-game-hack In PDF document text
    • http://cadcam.no/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://cadcam.no/images/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cadcam.no/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://cadcam.no/images/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • http://cadcam.no/images/www-rbx-com_GM431946152.pdfIn PDF document text
    • http://cadcam.no/images/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://cadcam.no/images/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • http://cadcam.no/images/coin-master-today_GM406889139.pdfIn PDF document text
    • http://cadcam.no/images/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://cadcam.no/images/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://cadcam.no/images/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://cadcam.no/images/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://cadcam.no/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://cadcam.no/images/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://cadcam.no/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://cadcam.no/images/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://cadcam.no/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://cadcam.no/images/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://cadcam.no/images/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • http://cadcam.no/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049b2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B2 27212 bytes
SHA-256: 55778dcd54da2452527a5f51fe55099be5031f7d02476b920ae60df04f8eec86