Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f2ae8764f85111…

MALICIOUS

PDF

37.1 KB Created: 2020-11-08 09:58:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bfeee0621cba047d7ae6fa237eb809f3 SHA-1: b5c312cd75b051f9013e4d0764f0eba82c18f668 SHA-256: 92f2ae8764f8511142e522dcab2062b2771f718aeab5e1595a0408ba72c652bc
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://trafficel.ru/123?keyword=smile+direct+club+fresno PDF link annotation
    • https://fixoxotogixas.weebly.com/uploads/1/3/4/3/134374926/jeponifoveta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_5f8edea3e6e61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371244/normal_5f9ab4cf185af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5f93269306d94.pdfIn PDF document text
    • https://masejufubalabej.weebly.com/uploads/1/3/4/3/134388341/5845314.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8980310.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/daxipinepejul_pesev_wefovi_bexawobawu.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/pisik/kituba.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/8802352624.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/aparato_circulatorio_anatomia.pdfIn PDF document text
    • https://s3.amazonaws.com/bidejonixom/41783723767.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_off00005328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5328 5200 bytes
SHA-256: 79a11edde4f0d28201dfb4bc39c46cebe0a6c8b86a5af03842d29b13ecd43361
font_01_sfnt_off000064c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C2 10280 bytes
SHA-256: 18248833db59815033995cbbc5348c8f4d026af6b65c961f7937eac4194c3a85