Malicious PDF — malware analysis report

Static analysis result for SHA-256 370c0a3e6d8325cd…

MALICIOUS

PDF

46.5 KB Created: 2020-10-03 09:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ff76c655c40c6cdc977fbc0b4350145b SHA-1: 26989ca333068520c4453565425987ac99574efc SHA-256: 370c0a3e6d8325cd1a2dcfa47233a6fba607960b17ccd23dc48d4d31f1369a23
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/strik?keyword=muse+plug+in+baby+tab+pdf In PDF document text
    • https://site-1038493.mozfiles.com/files/1038493/53469415240.pdfIn PDF document text
    • https://site-1040200.mozfiles.com/files/1040200/33671067921.pdfIn PDF document text
    • https://site-1039307.mozfiles.com/files/1039307/pufujadedo.pdfIn PDF document text
    • https://site-1039179.mozfiles.com/files/1039179/14333310803.pdfIn PDF document text
    • https://site-1036692.mozfiles.com/files/1036692/kafoxezewuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/563d928f-9fcc-495b-b8cf-b01c187322e9/7774346151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a545499c-ae12-4ebd-a42c-29436c2f1b88/46359683965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fee245ae-e4b7-4c7c-9825-44a26c79c965/19310147041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea32aa44-73e1-40a4-a156-db69aeafe5de/jimobitipir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/970aa8e2-66ae-4436-9ff6-ee9a9dcca98d/wuxiredobumoludawiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4217635-5cc6-41f4-85a1-c5eef9960b2f/betezasusakomobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b1957bd-a4db-46b0-848e-773941f1e9ce/safekujejivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c295fb90-5ec1-4872-b16c-a68bba87059e/24003306452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3425be89-e193-4869-bf90-14a21ca357dc/fovevidujuberiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce3ec45d-6896-43da-a5f5-f360f676fe0a/29117055436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08f2ffad-d8a7-4bd0-a6e9-68e5c139086a/nomejas.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_off0000738c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x738C 5360 bytes
SHA-256: dcbc8aec4781669a643e36af6eb59cbb9c5729419e150d19dd94820363935fe3
font_01_sfnt_off000085ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85EE 12492 bytes
SHA-256: 99c28b8e543ba28faf46125f1350d332fa7c9ae9feda82dfb1b9b53d9a3f03bf

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