Malicious PDF — malware analysis report

Static analysis result for SHA-256 29be6bb2cf463a86…

MALICIOUS

PDF

66.6 KB Created: 2020-11-05 22:33:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: adc098dd8ec291fd369e7c8d37d3e628 SHA-1: 3ce5e3a751bc8589f98847824646932f53c626c6 SHA-256: 29be6bb2cf463a86b282cafa5e1890b94f494794b1a3ad205eb45067821b4b7d
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://traffset.ru/aws?keyword=korean+war+maps+iron+triangle+1951 PDF link annotation
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/1905261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5f8976ad0afb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369786/normal_5fa1137d2912c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388835/normal_5f9b7a8da37c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372373/normal_5f97bf6cab124.pdfIn PDF document text
    • https://wumudirega.weebly.com/uploads/1/3/4/5/134515906/3f495c84aba.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/rotowan/aqua_affinity_enchantment_do_in_minecraft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b88783fa-ab88-4496-9c3e-12f90d272a8d/37541168149.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/13408282521.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/gofuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41ef6b6f-f6c0-4c0f-90dd-2b365118f944/law_office_procedures_manual_for_sol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62bcfcbf-5a2a-436a-af7e-fd24e8e1e547/napufosubetu.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/pepuvopidavupitikiko.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/39986417515.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/black_knight_pictures_fortnite.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_off0000aa6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA6D 7416 bytes
SHA-256: 28aca0a7665bdaac5c2dab90a9da1f41899d1fe8be4405e87ffcd3487d4b15a9
font_01_sfnt_off0000c354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC354 5532 bytes
SHA-256: dd1c40b95b04e553d0e21827277fbcec5c873539b7b44e09d0b79cb29c57a85e
font_02_sfnt_off0000d62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62D 12068 bytes
SHA-256: 02799d2d763de1d3e270af817d20c2c6bfee0ebd471f9c6c5ab148e7a02d608e

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