Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd930ad965eb628…

MALICIOUS

PDF

46.6 KB Created: 2021-05-13 08:32:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 179688a03fb1888b30f167ef2c4953c1 SHA-1: 1573aff27e10d0656545872b0cb717fbbd670981 SHA-256: edd930ad965eb6283509ee7446785a4e30a7df6c472c78df371934adce45c13f
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a fake CAPTCHA lure and a large number of external links, many of which point to scam-related content. The primary URL, https://netcdn.xyz/app/431946152/free-robux-no-verification-at-all-game-hack, is likely the intended destination for users tricked by the CAPTCHA. While no scripts were directly extracted, the presence of external links and the nature of the lure suggest a potential for JavaScript execution or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/free-robux-no-verification-at-all-game-hack PDF link annotation
    • http://ferienwohnung-dorsten.com/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004978.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4978 27884 bytes
SHA-256: 9e22beb0bd8a94ae373ecd89c20090e378c176753f8903775cb326d34ed5d821
font_01_sfnt_off000088d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88D1 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9283 18676 bytes
SHA-256: a2274236a7a2e18adabb7b86c58cf77696514c901240e043c32ff4f0260e6091

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