Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff701e4cc54eb11f…

MALICIOUS

PDF

35.3 KB Created: 2020-11-07 06:36:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 1ac4949fe0aa8d279263041652a3a40e SHA-1: 519d208b034e2dde68af820678b353a330b30dda SHA-256: ff701e4cc54eb11f52edefff9bad863c3f09fd59b780b80fe070ffe1a130a9c6
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=grace+brethren+church+in+clinton+md PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418777/normal_5f9fc9c66e524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388046/normal_5f9bfbb977e25.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/e3d873cd-04d0-472b-98d9-c6ebbcdb0e70/bumuvinijit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36bdb20c-cc22-4a4d-9b00-0b8bf9ef5848/5110550671.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/local_winds_definition_science_kids.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/the_kabbalah_tree_of_life.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/2721947585.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/gitejukanexapali.pdfIn PDF document text
    • https://gopigabipur.files.wordpress.com/2020/11/acer_chromebook_11_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/maplestory_explorer_4th_job_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d067b760-2534-4d13-a44f-f3bfe4bf11a0/76366761474.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_off00004b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B2A 5172 bytes
SHA-256: 0149178253d43062ce6b17c9a5a46085b47c8af125a76cbbcd5e6db8da98bc39
font_01_sfnt_off00005c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8D 10764 bytes
SHA-256: afa59209f876fa12f3a9109befc0d3501d75592660bf2bcf158cb21216c6e9a3