Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9b93f33c9b8482…

MALICIOUS

PDF

44.5 KB Created: 2020-11-04 05:10:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: ec05014fd8355585c50af8edc2049c02 SHA-1: 8e870ec3ddb557ffc8d70ee64bc8ea6b8ba4b5b1 SHA-256: be9b93f33c9b84826923a62bc8e82f73f44bcb2d95ab14a7c39e29aaa610de32
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://gettraff.ru/aws?keyword=pixma+mg5320+series+canon+printer+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367290/normal_5f8886e12a66f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369160/normal_5f90dc988c3c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401703/normal_5f942360a4235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370071/normal_5f9baa3614c12.pdfIn PDF document text
    • https://jufukakoxojopop.weebly.com/uploads/1/3/4/3/134317893/5c7d03b5c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462678/normal_5fa1e95d38495.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_5f8c7a885260c.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/zutilipevozafeguwu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/vobevigazo.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/10556407726.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/64264043281.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6025 5768 bytes
SHA-256: 96bec7a52897f95bdc9b4dda97cf13ebc160067a63f5b18c266b24ae87afbc81
font_01_sfnt_off000073af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73AF 10460 bytes
SHA-256: e7dacf7ec51250c4963122da7f9cb8c4c2c5cb41a00ea1d8281f58b61768e412
font_02_sfnt_off0000973b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x973B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e