Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fcf6e67483dfab8…

MALICIOUS

PDF

44.8 KB Created: 2020-11-09 14:34:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 545b4af6086e44d6dfd3211697c4d3d9 SHA-1: 71807112a093897bf61c32b1bab5d40401b4d643 SHA-256: 3fcf6e67483dfab8a8e18ffa5f68cc7b701a93c8c2b366eed71f0333369bcb07
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://traffking.ru/aws?keyword=pork+loin+chop+nutrition+data In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388608/normal_5f96c085dc772.pdfIn PDF document text
    • https://wizenavadabavor.weebly.com/uploads/1/3/4/5/134518239/2084119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_5fa0e51a1dcdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408188/normal_5f9b8b46d5458.pdfIn PDF document text
    • https://nulejifoxomopik.weebly.com/uploads/1/3/1/4/131437436/xefetowawinugiluravo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388427/normal_5f923ee1c3353.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_5fa06460099ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_5f9137fb10197.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zuxadol/xusonigupegunoki.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/42890968571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d1253fc-29eb-47f9-b576-f1efbdbff5af/11604247935.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6210 4812 bytes
SHA-256: fd172861ac6b7db455ac3299972a619dcd4c41f33d771a248602dbd25ee72d35
font_01_sfnt_off0000724e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x724E 11188 bytes
SHA-256: 47da9fe716c16a095bb766747c46853dffd05e9b18c7489a4ee76dcc0b2f0764
font_02_sfnt_off0000983f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x983F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378