Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d6d1476bbb965a…

MALICIOUS

PDF

53.9 KB Created: 2020-11-06 04:01:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a22ca6f4ef75d2b9272418ff5d1abd0f SHA-1: 9232431d50816c1f95999586ddef8f0e2903582d SHA-256: 08d6d1476bbb965a4a2902a9a3ea4fbacc322b8f86487e382407974b050dd9be
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URL that points to a suspicious domain, identified by heuristics as a link farm on disposable hosting. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=roadmaster+granite+mountain+bike+26 PDF link annotation
    • https://vesexifog.weebly.com/uploads/1/3/4/4/134491049/6717612.pdfIn PDF document text
    • https://balejumefem.weebly.com/uploads/1/3/0/8/130814467/dalula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368762/normal_5f9ee8fc477c7.pdfIn PDF document text
    • https://lesuwigiwojan.weebly.com/uploads/1/3/4/3/134309114/1ff6d.pdfIn PDF document text
    • https://vebunigujop.weebly.com/uploads/1/3/4/3/134367951/b332d067ae4d47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/423abcfc-bc14-43fc-a838-732d63ca381a/toserosek.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/the_birth_of_korean_cool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0f9702e-7fcb-4fca-8e4b-56424fffefef/saginaw_bay_fishing_report_sebewaing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4715/6410/files/ambico_tripod_shoe.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/robie_uniacke_bio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6898/7294/files/67857930363.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9393 5612 bytes
SHA-256: 8e6a64d765c9fdaa6a091930bc278bbc0e40006dc8d393dc151f4c0ee061adbf
font_01_sfnt_off0000a697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA697 10596 bytes
SHA-256: 8217b48aceadd8dc87dda2a2d3cb75fb1fdc85bd3e8f4c868675e52a09496edf

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