Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8aba569cac87833…

MALICIOUS

PDF

46.2 KB Created: 2020-11-05 15:50:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 6b561815b1fbae3322c91e6b678a03d0 SHA-1: 7e14d78ffed066633077bbdfd1a7ed9135749991 SHA-256: d8aba569cac87833b91b070cd2b8a1d14d7694c8479d104f631eaf6c20508cdd
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/123?keyword=notice+of+interested+parties+california PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373983/normal_5f90358c8f617.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f920775d416f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408706/normal_5fa367392350e.pdfIn PDF document text
    • https://nenojidadexodu.weebly.com/uploads/1/3/4/3/134351563/179b6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375531/normal_5f936e72bebaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381551/normal_5f8fd5452a3e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368958/normal_5f99ea25a0d88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f881714a72f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388157/normal_5f922fb1d61cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f989f755ce1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448346/normal_5fa361f5e5808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_5f8e0462a346a.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/wilugugo/14296919747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a7c0fed-096f-49fa-b9fb-018b4877512e/89515132281.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/48027469889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87580c5f-168d-474a-8932-15bad487439c/salinas_union_high_school_district_jobs.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_off00006770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6770 4908 bytes
SHA-256: 2ee4aa9dd493069b264908a90dbf73a7758e335c9025a21565b3dc0b49fc6867
font_01_sfnt_off00007824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7824 10908 bytes
SHA-256: be3a5a3c310009892fcecd2361a39814c2ed3fc356dabbbf0f04a5e04b6fec7a
font_02_sfnt_off00009d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D5E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176