Malicious PDF — malware analysis report

Static analysis result for SHA-256 8acf38c2a29f181d…

MALICIOUS

PDF

41.2 KB Created: 2020-10-31 15:58:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7e3f4356e4f5f7150647f86418d495c8 SHA-1: 6864fe3e88ee1108563e788fe216b96989fb6f44 SHA-256: 8acf38c2a29f181d2e3c610e8cbc4e2dd847da41578a67b44efc75ad3d2f07e7
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://gettraff.ru/pify?keyword=celtic+heroes+level+guide In PDF document text
    • https://feloxoxux.weebly.com/uploads/1/3/4/0/134000485/lopipejekuriwusavujo.pdfIn PDF document text
    • https://wixurawitubeza.weebly.com/uploads/1/3/4/3/134319602/kifevipixim.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/xufewudetadopaw-luvel-weweweravuzi-gifagim.pdfIn PDF document text
    • https://jaxebenub.weebly.com/uploads/1/3/4/2/134266064/7062447.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zesotat/team_of_teams_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63f204cd-5f8f-4528-8fbe-b4d47fc24c54/d750_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba9c7321-a04a-4400-aba9-46e2a8bdcea3/bipemizepofetewunusosij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/331a592b-5c33-4f8a-995c-3d1283a68988/siwojemanovipugemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b1353b-2388-497e-9d4b-e933e2f725a7/vuselale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a508dd-4cb7-4e50-8da4-9916f7494536/xogafawozazomutawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c556413-8285-410c-b1a3-4228c157e57d/vubuwarufowulorebusazelek.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/wijezotagozerepura.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/63530956803.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/xerostomia_management.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A5 4956 bytes
SHA-256: 91e8e87bfcf502f6d549d7157699e7e4f7ba4e163ece08e4e6418e536915f005
font_01_sfnt_off0000747e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x747E 10440 bytes
SHA-256: 2994e44826f0280a981887677116eaebcc33881eebe6a4b7e8d8b2552fdfe40c

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