Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c193eae16a516da…

MALICIOUS

PDF

67.2 KB Created: 2020-10-02 11:40:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 347132bcd746220e4f7f741b0c607d33 SHA-1: b441532af61f5147fb8616c3c2ab222f0a974f72 SHA-256: 9c193eae16a516daca44f60ba73d969a863f592779b907d6b3c8de5dcb6ef8a3
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://gettraff.ru/strik?keyword=agenda+2019+download+pdf In PDF document text
    • http://vofuwawud.tomcottrelllandscapes.com/uploads/1/3/0/8/130874063/ninenuz_nabipejoz_labug_kuvariraruko.pdfIn PDF document text
    • http://xibevan.windowsofhopeintl.org/uploads/1/3/1/6/131636665/b89f97f25a5acb.pdfIn PDF document text
    • http://gakiba.keiloreastrotary.org/uploads/1/3/0/7/130739206/4bc729.pdfIn PDF document text
    • http://vojobonob.mylocalbean.com/uploads/1/3/0/7/130738971/647664.pdfIn PDF document text
    • https://site-1039889.mozfiles.com/files/1039889/besoseruronubemobalex.pdfIn PDF document text
    • https://site-1036627.mozfiles.com/files/1036627/31432860527.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/ddd6ee23-f0f6-4839-83f1-9835a96a170a/goxovatuwelobari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efe42b69-f220-4fcd-816d-4a4bf14a62f3/85577994646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/447e1095-d9ec-4cbc-ae1f-2d277cd3a2fd/jutele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3842/5766/files/adobe_animate_shortcuts_f5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6803/1143/files/there_once_was_a_man_from_peru_author.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8028/0989/files/angry_birds_star_wars_online_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8209/6535/files/binizigifabesifuwinex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3498/8703/files/population_of_nova_scotia_towns.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_off0000c7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A5 5496 bytes
SHA-256: 50bfa8244f560e4c7d807dd1b62433b3fefaf9c661a8024c573a194c3d641b45
font_01_sfnt_off0000da8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8A 11024 bytes
SHA-256: 324a4d102bf3967beacb63d7ad908ba6f4e89092d253b84ed25964dfa403e4fc

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