Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1ed097622d85ad…

MALICIOUS

PDF

44.3 KB Created: 2020-11-09 12:44:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 29fe4f9c929f2d3d5411060b0dbe7ede SHA-1: 060e713d5934c1e0c056bb3d0dd398ffc4c7fa57 SHA-256: 8e1ed097622d85ad2afd51c072fd8b34fbbe7074c14ab135ae2737093d868c4c
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/aws?keyword=tuck+everlasting+study+guide+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383794/normal_5fa144e87413f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5f8bab4fc8a29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403117/normal_5fa8ca9b1d65e.pdfIn PDF document text
    • https://nulejekenafu.weebly.com/uploads/1/3/4/3/134367691/rotuna-zabumidamekifom-xagukuxusugofa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f87461f4b24d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414488/normal_5fa26111e37dd.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/394d2159-7415-41e7-ae31-5421b318bdd4/28264706528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f49db91-7a67-40cb-856e-7641934dccaa/wilotuxorekurudugowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7b706b6-7f2e-4d9c-abd8-847557281b52/52207461840.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/hamilton_county_auditor_property_tax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b65e5075-c082-42e4-8936-5bd4d0374352/22904487783.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/suwidadokiz.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/lake_county_marriage_license_indiana.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_off00006f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2F 5372 bytes
SHA-256: de29ccbda32373d9714e3d2bdbca00fb704e73a8808d575afac77013f4ed981f
font_01_sfnt_off0000819f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x819F 10236 bytes
SHA-256: a99b3d63a2baf7dd911cdc91ea680166cbecdaff23df9a53b8e0d07bbec11175