Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4e74c828021e6f…

MALICIOUS

PDF

42.6 KB Created: 2021-05-17 23:07:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 56cef6cd1ba2f56f441c044018a45d42 SHA-1: 6d3d7998936edf1f9971bd849c3a68c427b14aa0 SHA-256: 2e4e74c828021e6f53bb3670f7bace1a8c9710894dbcdeacdc220ef547f3a166
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are SEO-optimized lures for game hacks and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a malicious intent to redirect users to potentially harmful sites. The presence of a direct link to a 'minecraft-free-download-no-virus-game-hack' further supports this. No scripts were extracted, but the document's structure and embedded links point towards a phishing or redirection attack.

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/479516143/minecraft-free-download-no-virus-game-hack PDF link annotation
    • http://unifieo.br/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/get-more-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/free-coin-master-spins-and-coins_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_off00004af3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AF3 25020 bytes
SHA-256: 0a147f5b25c6dc4dbe020827bdca36d44d48cc1a5993b1dce3d3688c19f5c912
font_01_sfnt_off00008335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8335 18564 bytes
SHA-256: 73fda2f7f87cf364c845d3fc1df52f7bb102f180f2e093609ba7690804eae928

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