Malicious PDF — malware analysis report

Static analysis result for SHA-256 552364c31bfa6358…

MALICIOUS

PDF

43.0 KB Created: 2020-11-04 20:53:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 3884d314645f15d07cddfea828c9645e SHA-1: 4b47da0b5e99b4b3f761a8d85f81734da9676e8f SHA-256: 552364c31bfa63582b4061e272b5947f1ce10a9706ebdc147418c7efd17bf8bc
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://ttraff.me/123?keyword=why+do+congress+move+to+strike+the+last+word In PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/sipab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418185/normal_5f9f0b7460b1e.pdfIn PDF document text
    • https://jatokogeredere.weebly.com/uploads/1/3/3/9/133997843/wakapaxewixiko.pdfIn PDF document text
    • https://gofegupozomo.weebly.com/uploads/1/3/4/4/134479888/8235e5b6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389090/normal_5fa197e2d6293.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383327/normal_5f8c82f1d2534.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/1b951f22-a16d-4dae-8b12-558531ca19ba/vogexezipip.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/xovisijufovevax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a7c13ee-3f2b-4982-abac-71aacb8c90f9/xosefitowatizofulaxovoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29db6236-9a0c-4389-bd54-1a986870b430/the_penis_enlargement_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57bc4274-fab0-4424-8b59-a79505c41e7c/31641791678.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faac3f1b-3884-4e40-84a3-49abd1cc300a/32304384319.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/it_project_manager_roles_and_responsibilities.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_off000067bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67BC 5684 bytes
SHA-256: 36857fb2ef9a472450fa2dfa5d98d90e803185a3e1602da1b2d8959f5231b6e2
font_01_sfnt_off00007b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B08 10508 bytes
SHA-256: a7bc936a93511c2973d91a04ce89e72512cd88f10837fb33cb5128c4c8e25535