Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca28fdf920ed077f…

MALICIOUS

PDF

44.1 KB Created: 2020-10-27 14:14:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 75f33b0537e6034bd469e9cd42812f06 SHA-1: 9d3caba56bcf036d94f9cc1a8205308f74a6ab6f SHA-256: ca28fdf920ed077f7ea793891f1a0b51865323adefa594bd0a07f545063e7e6a
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=watch+black+butler+season+2 In PDF document text
    • https://xonuvalax.weebly.com/uploads/1/3/1/4/131437330/fixaxi.pdfIn PDF document text
    • https://xekixudag.weebly.com/uploads/1/3/4/3/134336078/fepugag-nopuranirok-wadeg.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/358353.pdfIn PDF document text
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/dawilusomugu_banebitebumu_mezigemetulizo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_5f88bcb191421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380674/normal_5f8c45a735a92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379473/normal_5f8b5abfa3010.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8028/9956/files/24283871357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9617/8849/files/multi_function_domestic_sewing_machine_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0101/1611/files/the_one_day_war_judith_soloway_theme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/ka24de_for_sale_s13.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9795/9837/files/xadese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0255/2735/files/fifty_shades_darker_book_quotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4714/7925/files/69213352425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8947/0637/files/what_is_suprasegmental_phonology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4244/6231/files/wilsons_promontory_accommodation__camping_visitor_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08e15352-ee06-441a-9c05-4ad2688b666c/janunuwawuwafubivagazama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6324a833-0cc9-4088-b6f6-ad8960a87dc0/wewonojafipojonilutef.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/kamawenotivumixetanu.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/suwotupo.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/apgar_score_for_newborn.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/jurnal_pembuatan_preparat_apus_darah.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_off00006e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E06 5236 bytes
SHA-256: 1e21c026b351ba381eacd7935181973d49fd4cf1ee4b99cc1f20af67b0705d8c
font_01_sfnt_off00007fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD9 10336 bytes
SHA-256: b564d459a300a62213c09a95f9d3052533c2aca3ab5fe7db3ef1ce8c09dc8285