Malicious PDF — malware analysis report

Static analysis result for SHA-256 022df9eb6e3b0422…

MALICIOUS

PDF

37.2 KB Created: 2020-11-07 04:05:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 5a37a2aec3d97972fc60d196af88bf5c SHA-1: 22b21a517ce923730183484ca10e83f272b6413e SHA-256: 022df9eb6e3b04224e2716548425fb7c2db50fcb4500d95b1825ab56af22408a
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://traffking.ru/aws?keyword=jbl+endurance+jump+pairing In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404514/normal_5f9362ae96cb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379601/normal_5f99a4d1130a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381085/normal_5fa216af9f8ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384323/normal_5f9aed6b02695.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392871/normal_5fa1992232e1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_5f922cdf2f43b.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/tarajix/public_administration_ignou_books.pdfIn PDF document text
    • https://vipuvixo.files.wordpress.com/2020/11/pavarilojovofepozofituvow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37688a26-1d71-4196-88be-df018d40882b/lalezesefiboxavadototi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4fd3dee-79a6-4345-bc92-9601143479c2/kogalisekobodegifewafadak.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_off00005532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5532 5420 bytes
SHA-256: 44a6c88013c2bb8a829db08adf6e543220dbb7e2bd51ab5031e2cc0538953429
font_01_sfnt_off0000678d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x678D 9608 bytes
SHA-256: d448e16fe586441a12cb9672cfef2e3fef29d3f4b3fddc08b4ebbda5da594e99