Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f497db2ced8f272…

MALICIOUS

PDF

44.2 KB Created: 2020-11-09 16:13:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: d93b6b12195c780fdbf8aeb97625649e SHA-1: 8a356335bc703a7eafc6736acbf307bf153cbb8c SHA-256: 5f497db2ced8f272bdd96d2fd0a6835cfc957819cc25c2336e256ca8e1cac686
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=compensatory+behavior+list In PDF document text
    • https://betutinixe.weebly.com/uploads/1/3/4/4/134481053/f44f0a5ad5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377933/normal_5f98b12f910d5.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/a0d6c876-c142-4ac7-9b11-ab65bf0fa658/66736037726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c85ab7e9-3ff4-4b5c-bda1-883d2a9ea033/lerimopeguralokolagow.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/finding_slope_practice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b931ec3-f21e-400d-b950-44aa76f8f62e/dominos_margherita_pizza_ingredients.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/maths_book_for_class_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db372daf-8738-4042-a21c-677127ae0cdd/daniels_and_worthinghams_muscle_tes.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/66158264554.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_off0000702e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x702E 5264 bytes
SHA-256: a26ff097a227575550e25c4c658198342692aa399c9c42ffbb8c1aa73988abdb
font_01_sfnt_off000081ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81EA 10224 bytes
SHA-256: c166f85298d54799b90b9bfa819de8e94ea6d8e05e9aac316dedec7a718ce092