Malicious PDF — malware analysis report

Static analysis result for SHA-256 1361f7267c208630…

MALICIOUS

PDF

45.2 KB Created: 2020-11-05 19:48:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: e2ea58efcfbc78d7d3fd788a38dbb292 SHA-1: fb502c247f9bb500ffb7f3d91ca974a054f5c470 SHA-256: 1361f7267c2086306f108d981f4368b356042bd09adfa132bc566d1ad6890e77
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?keyword=web+design+software+tools PDF link annotation
    • https://fuvipizewovotat.weebly.com/uploads/1/3/1/0/131069886/cb1ad389bb24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386830/normal_5f9228d659861.pdfIn PDF document text
    • https://jowodetuleguzu.weebly.com/uploads/1/3/1/8/131856173/58dce66.pdfIn PDF document text
    • https://gexaxiwiwa.weebly.com/uploads/1/3/4/4/134480231/luraze_netabedilina_tabefej_japuwigo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416495/normal_5fa22ab0782c3.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/247848fba5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373301/normal_5f9e954965e1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374682/normal_5f8d9a3e7e4b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5f8a31d10f43b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393188/normal_5f9b0660267d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462986/normal_5fa3f09f5706a.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/sazariwapa/78394343987.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/insurance_memes_images.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_off00006648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6648 5108 bytes
SHA-256: ee0c79f2f144edd1d15590a84a57782d6d822c800dcc87f130f84a2c131561e7
font_01_sfnt_off000077c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C4 10060 bytes
SHA-256: 5515d940bb551aab5f36a1d1d5a5a2e01096dc0ce8d88359e1c868bc432d45eb
font_02_sfnt_off00009a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A1D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c