Malicious PDF — malware analysis report

Static analysis result for SHA-256 0300c0ab07290272…

MALICIOUS

PDF

55.9 KB Created: 2020-10-07 03:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 49f55f578c9d9daac668bd03dfb4e403 SHA-1: f4835877d715d5374a5cea0148c4cbbf496803a9 SHA-256: 0300c0ab072902722f921b1f276951503f0c9b339cf2fee7060a5a70a3ed66e8
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://ggtraff.ru/strik?keyword=va+airport+acknowledgement+form+pdf In PDF document text
    • http://files.igoevoberaargau.ch/uploads/1/3/0/7/130738741/gisometafofowop.pdfIn PDF document text
    • http://files.elimchristchurch.org/uploads/1/3/1/3/131378930/5612193.pdfIn PDF document text
    • http://dikut.thegivingvinethriftstore.com/uploads/1/3/1/4/131407021/b3dc8d12b5cd1.pdfIn PDF document text
    • http://files.anzaborregopaleo.org/uploads/1/3/1/4/131438299/jibetilufi-tibokobijipur-jajuni.pdfIn PDF document text
    • http://files.roacm.com/uploads/1/3/2/7/132741089/7540c5.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/408a8b46-3b94-4dfa-9a1f-56388d7cfb0d/82774983310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/026893be-680d-4ad9-893e-6509a521a80e/rurajurepejesonoxosabaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2169d672-4701-4331-b007-e0211e3384e3/60086336522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/1407/0943/files/monomuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8945/1425/files/52158384132.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_off00009e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E8E 5416 bytes
SHA-256: 5f6ab849bd073a5ea3861667b339a773f75ec08307eae0bfe7a998caa1520faa
font_01_sfnt_off0000b102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB102 9912 bytes
SHA-256: 73b0672ed655337d3f865b7a4a795cfecb1fb900a5b5db9e7903b0e06eea0415