Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c22b0c1999450a…

MALICIOUS

PDF

44.5 KB Created: 2021-05-15 11:30:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cc841eef61c432e0064c3160589b9e3f SHA-1: 018ad5d3d9ccbcfa717b1f35e02d82fe3e292f04 SHA-256: 58c22b0c1999450af15100960970bbb85308423092a5b3ce3b7fe7970cf54051
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on what appear to be game hacks or generators. The primary lure URL is https://netcdn.xyz/app/431946152/roblox-robux-generator-game-hack, and the document also hosts a large number of other PDF links, likely for SEO manipulation or to host further lures. The ML classifier strongly indicated maliciousness, and the overall structure suggests a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/roblox-robux-generator-game-hack PDF link annotation
    • http://waldkindergarten-abensberg.de/images/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/get-robux-today_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/juego-hackeado-de-coin-master_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/how-to-get-free-robux-youtube_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
stream_003_off00004aa8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AA8 27952 bytes
SHA-256: 02cd8f274701193f97123d4072403a429d1f8e2345cd8d63305bcd968b6e3392
font_01_sfnt_off00008bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC7 18256 bytes
SHA-256: 5ee160adc2cd2b50f67dfe0d7652360e6cad44731d7ae2e4db544c54b4fa7397

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