Malicious PDF — malware analysis report

Static analysis result for SHA-256 765f0d6dee249fd3…

MALICIOUS

PDF

42.8 KB Created: 2020-11-05 23:04:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 7d8dd6a33ea783376f94de88de3807a9 SHA-1: 498a907a0bb7beba5e66b918c1a83ded85e61c19 SHA-256: 765f0d6dee249fd334ad137c9bb9afb2c3cf7ada0284cd832271800f2f74a2c6
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=which+of+blackbird+pond+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414869/normal_5f96805e59366.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/9192808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414515/normal_5f9705978a55f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409239/normal_5f97d49d9de0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413111/normal_5f9d051e30ca0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_5f8d9f5cc82bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384325/normal_5f90a3477d673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377407/normal_5f8f77ccb3abf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5f97d90e3d3bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f8cf0655ab0b.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/susopuzupure/arena_simulation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/ledajisurozuroripor.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/dikokesipiwive.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_off000068f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F9 5284 bytes
SHA-256: 1d3f1115bed24920936ae4ff6140cf9ca490abc6fe608fd490919652c0f2a3e8
font_01_sfnt_off00007af8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF8 10352 bytes
SHA-256: e3e6e68f0408a5ef84d67d43fd7f50c5871b7b431da750ca68de1a43d55a0b67