Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f23bdcf37bdcaf1…

MALICIOUS

PDF

52.3 KB Created: 2020-10-26 07:18:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 98d235872e4ec03101d5492c03b5c169 SHA-1: e5bb4234fb22b20d00540dd7476b87e580b638e9 SHA-256: 9f23bdcf37bdcaf1abe70260610fe6e0e4175b1306e829f9ffd0f1a725699c83
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://cctraff.ru/aws?keyword=canon+600d+specifications+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_5f920badec4ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383807/normal_5f93ae84f0ec6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407100/normal_5f93ae0bf338c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5f8d226cdb7f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377401/normal_5f8b2eb12cd4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392462/normal_5f8ee44a1ed6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f872cd6b1326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366642/normal_5f8d950513a0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402963/normal_5f93c3a9406bf.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/lejexafopotak_nuwevirafikuv.pdfIn PDF document text
    • https://gujojiri.weebly.com/uploads/1/3/4/4/134434224/77b6e520.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/vomaf.pdfIn PDF document text
    • https://zigegawemofeza.weebly.com/uploads/1/3/1/4/131406932/a4d080d2cc50.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/vidadaviwal/lipatu.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/metro_map_paris_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/bare_infinitive_verb_list.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/bewafoviridev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfde4c87-c6de-4326-b9c6-2ca927804e98/dasenoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/533380af-a3da-415e-92cc-3cf36f6fce82/nekexodujevaxik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eaf2fc9-3fde-4010-bab4-9eea4103d425/81760110705.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/krishna_bal_leela_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/43190252635.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/62859283780.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/puxedujud.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/9646334702.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF2 5220 bytes
SHA-256: 30c4522960c9118a4c2b85713e0cab46d9e43e259fc42c3d202a1892a1670829
font_01_sfnt_off000081c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C3 11072 bytes
SHA-256: f2f0ea94d1d0848f874bea372e7dd670f9b34f430a25bbc245f46c91fd17a358
font_02_sfnt_off0000a7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7B9 17928 bytes
SHA-256: 7c4fc99b80b6c49a175391eb708179310166a076945ec7f49d7f324955888817