Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd4a0e1c63b8763…

MALICIOUS

PDF

41.5 KB Created: 2020-10-12 06:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e224b446b7101dc8922c802cd1b08115 SHA-1: 707739a87a163ba433a02f4f0164c7b31e91fc0f SHA-256: 3fd4a0e1c63b87638a7aa4737d2614f8c9cb3e6bfae16a418365c3ba9acb5903
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://ggtraff.ru/pify?keyword=brain+candy+games In PDF document text
    • https://site-1048178.mozfiles.com/files/1048178/dedunorefozetamuvajeladu.pdfIn PDF document text
    • https://site-1041384.mozfiles.com/files/1041384/bobibapubibitaz.pdfIn PDF document text
    • https://site-1040354.mozfiles.com/files/1040354/vejigadavumuvofenutanigu.pdfIn PDF document text
    • https://site-1036767.mozfiles.com/files/1036767/daxugonu.pdfIn PDF document text
    • https://site-1038527.mozfiles.com/files/1038527/42124717333.pdfIn PDF document text
    • http://files.misternick.info/uploads/1/3/0/8/130814856/5a3e14bbf528.pdfIn PDF document text
    • http://lamazu.galceranartandfilm.com/uploads/1/3/0/9/130969808/9024457.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/1/0430/0334/7098/files/33414606483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9902/0696/files/essentials_of_world_regional_geography_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5280/0929/files/the_phosphoryl_group_transfer_potential_of_atp_is_higher_than_that_of_phosphoenolpyruvate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0788/7518/files/napaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7201/1932/files/60395924434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5222ed37-3391-4492-a3f0-778f938a9dda/11154293585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47ff996d-e277-4be2-bb82-9505905630c8/digosojeluwefopiwibamoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d08f8e28-dc90-40fd-9cce-e72bd9082f7f/dewaxafogiwujol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af3da61-7a25-4df1-9698-460da438cb26/kisoburixunaturuxome.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_off0000630b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630B 5380 bytes
SHA-256: 0c6fa88916b69d85740286f259d6ddb4e33d644737bc3d4d008d5a6490c6501e
font_01_sfnt_off0000753f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x753F 10576 bytes
SHA-256: 9b21a6bcd8feee38853ba02a23394f54a518af3797ab1a7e22d92590f77a563e

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