Malicious PDF — malware analysis report

Static analysis result for SHA-256 283a2951e41a06ca…

MALICIOUS

PDF

49.4 KB Created: 2020-11-01 00:55:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 5e83c424c579224718c30914c1052dde SHA-1: 70fd55f0920fd05ae70c6f3946e3949549a77673 SHA-256: 283a2951e41a06cafcfbc88f7b42266c1df9b95801d45fb70a8f1778f8595791
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?keyword=best+plus+size+underwear+for+tummy+control In PDF document text
    • https://seborokib.weebly.com/uploads/1/3/4/0/134096410/kegeputafixija_xuvonazan_wakunanemonat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f86fa4a99ab8.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/c970e335-42e5-435d-a4f0-25f26f3c26f7/john_deere_harvest_in_the_heartland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dea17538-e991-49b4-a2c9-6a8a4db32758/where_is_area_code_612_in_florida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7406a842-6352-49bb-83a8-8364a41e41b3/biblia_hebraica_stuttgartensia_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/669f4afb-612f-49c0-acf3-176d8d893cce/48964713408.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/samamudirutala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0300/5086/files/76668045372.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8325/8775/files/tegupudela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4731dc0c-6613-489f-ae38-351da5c7a3e3/38284773567.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/dakosivemumetakiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/8452/5991/files/22054385805.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/bitinije.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/fobajotirupu.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_off00008057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8057 5596 bytes
SHA-256: ee07e81f8c462e0137e069cc4fc4586988fa268c908b7c16ec9f13f7563aa71e
font_01_sfnt_off00009373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9373 10856 bytes
SHA-256: 306b976222ac07cf9b1fc153ef018af797bb40984ddea6042035674d5b901f03

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