Malicious PDF — malware analysis report

Static analysis result for SHA-256 001453b29b806a9c…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 06:29:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 56f84a805334c2d24eea5aebe46d2b4d SHA-1: c06acba12eba04357106a15bb2d42d020782a1b5 SHA-256: 001453b29b806a9cc92457de81bbde6b1fffc8b0314291a27493af5d249f337b
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of 'Free Robux' and game hacks to entice users. It contains numerous external links, primarily pointing to a domain hosting a large number of other PDF files, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the PDF structure itself is flagged for linking to a redirector and hosting a mass external link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/free-robux-meme-game-hack PDF link annotation
    • https://hotelyetihome.com/userfiles/files/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000533b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x533B 24736 bytes
SHA-256: b5ec15cf693c3214ed014edd793085cf1ebd358c25ad99e313a77d37fb7c9e5c
font_01_sfnt_off00008a86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A86 18468 bytes
SHA-256: 3e6db3c9d7b90636a2057efa50536683edf8623f57b31e837fe721178fdf9957

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