Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a312f1029a679c6…

MALICIOUS

PDF

35.9 KB Created: 2020-11-07 05:31:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 81d1e9c28aac1ab3ecd14c3144fce4eb SHA-1: 3e08424c5fc3dcf401c7c457d9acb24427655fd4 SHA-256: 1a312f1029a679c69649119a8893ef3e836cc3afcfa09405b0c1660e7a20bbb7
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=slimans+rockside+rd+independence+oh PDF link annotation
    • https://figotuzu.weebly.com/uploads/1/3/4/5/134579221/152f460.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369313/normal_5fa5c8866e322.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_5f9f5e17c5cc9.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/rirebubovatatiwimol.pdfIn PDF document text
    • https://silepokow.weebly.com/uploads/1/3/4/3/134366863/tubixofopijuje.pdfIn PDF document text
    • https://fusefediwotedi.weebly.com/uploads/1/3/4/5/134589876/sanerimisiv_tefibizotas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f99f87fcbb84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5f8fa6f6d0f3a.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/lalun_rumowibarevefi_gepivimiro_fafomepererodi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458625/normal_5fa12669baf6e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/83629941340.pdfIn PDF document text
    • https://s3.amazonaws.com/fokena/beavis_and_butt-head_spinoff_daria.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_off00004b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B08 5480 bytes
SHA-256: 8aee67cd0b7c703d95ea5cb3eec0c244ea64a6b3baa860a71f4bd230f925f3ab
font_01_sfnt_off00005d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D76 11212 bytes
SHA-256: 9d7194da856fe416a261643ed39204008fb7c566ee1e6c164646c958ecc9d1e7