Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfc0e01139059e16…

MALICIOUS

PDF

44.6 KB Created: 2020-10-15 08:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 47eed44e6a25e899d449d231e6f03a4c SHA-1: 73c2c1994f7f6c3f5938f92cf8de27a9bb904dce SHA-256: cfc0e01139059e168f5788037b3ee50deaa59bf9994506ebfc6439947e8c89cd
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://cctraff.ru/pify?keyword=bowflex+revolution+home+gym+instructional+video In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f871bda7a00f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f875e6e5d06d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5f87db8349b3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f873cbe53b65.pdfIn PDF document text
    • https://site-1036972.mozfiles.com/files/1036972/fujexim.pdfIn PDF document text
    • https://site-1043698.mozfiles.com/files/1043698/nabobefudubifipu.pdfIn PDF document text
    • https://site-1039645.mozfiles.com/files/1039645/58023791427.pdfIn PDF document text
    • https://site-1045368.mozfiles.com/files/1045368/soxatov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f874e03a24f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_5f878d3f3da56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f875b8ed5a83.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/baf7d783-9d90-4d1c-8b01-f5575d444854/vonigitelojox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56550f2c-2cf3-401a-bd8d-a5490d725a50/ximofolawoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2cc9c3f-6073-48a9-bb63-da34630ce7ea/dololigobuvudugoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a124007-616f-4473-bce1-629a3614931a/16137335937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/881e9c91-a801-4dd4-a158-f1dc975dbd9f/8516907902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0896/6307/files/unchained_rogue_feats_pathfinder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b001ffda-6e38-4bb4-8cb1-f3e72614349f/bovilulolamolilumesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3437ef5-150f-44a2-96fe-f29e61f7efb1/matunolunoxirilonepugol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/630519f4-b7ba-464b-a350-bf82d0890884/rutabawudusijugamemirasi.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_off00006d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D18 5808 bytes
SHA-256: 10d3f2783df607c911bf7c9ceed0d9e3f9bb95758a024770a6c94d4a788d4772
font_01_sfnt_off000080db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80DB 10616 bytes
SHA-256: 6ff965cd4a77a0b9fd5aa1bf631b217b11d6a0c5a3042eb150e1d14c8079fdf7

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