Malicious PDF — malware analysis report

Static analysis result for SHA-256 4305a9e2756ef2f4…

MALICIOUS

PDF

42.4 KB Created: 2020-09-09 22:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dac2c49efbe951df959b9993fa846e0d SHA-1: 7e7751057ddf43742042189729e07dfe79551b37 SHA-256: 4305a9e2756ef2f4e92eed157e1ca2a89eb061e40aebf576a6eef0107c638cdc
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://ttraff.club/wix?keyword=chrome+flags+dark+mode+android In PDF document text
    • http://rixowuzo.karachitutoring.com/uploads/1/3/0/8/130813834/nozewesu-sujezeboku.pdfIn PDF document text
    • http://movojef.lscodn.org/uploads/1/3/1/4/131437601/b1b62e9f08569.pdfIn PDF document text
    • http://zozixa.sebastianwetherbee.com/uploads/1/3/1/6/131606490/9e517e8282d.pdfIn PDF document text
    • http://files.byucssa.org/uploads/1/3/1/4/131453100/zatulija_minonakanadab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3638/5175/files/jazebawub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4037/2896/files/sistema_renina_angiotensina_aldosterona_medigraphic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7778/8057/files/tamil_movies_2015_download.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9e41f0_773aa3b0bab143bbb586a7953c33e6ea.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1d3654_16f78eb8105343cdbd72fadb0bb39a93.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f09a9d_c1e2e07a534244108e989472ea9748eb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6f53d7_1685af3d1fa741b982b82e5a96d035b4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3d7af5_af3bd9e1c0a548d5a9c70714d918a43a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1a94e8_1eb15288b3904dda87a01bf4f89699f4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f9fac6_d332e8affd1447f398e619acb4a38cce.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_off00006773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6773 5288 bytes
SHA-256: df81a78b8ab92d6b7a2559945b06e52cd75320db37b02487c8d6657d23c68ab8
font_01_sfnt_off0000793f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x793F 10352 bytes
SHA-256: 7850fc91c2ba11dbca1d4cc74c8befd1f7786643d664ee854f97dc19f2a4523a

Open this report in the interactive analyzer, or submit your own file for analysis.