Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a24a000239f249…

MALICIOUS

PDF

41.2 KB Created: 2020-10-04 02:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 4aa8280c1064b84fee7d2348b4214934 SHA-1: ff48f0127d46de25c3cfa3eb81837757fc625a77 SHA-256: 08a24a000239f2499e63031d636b25be3251eda6ef18105d13f328cd7ba55547
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/strik?keyword=piece+de+theatre+comique+courte In PDF document text
    • http://files.goldenmeanpilates.com/uploads/1/3/1/3/131398088/nedovuviwe-tezufegibofode.pdfIn PDF document text
    • http://files.willemhartman.com/uploads/1/3/2/6/132695323/3e273e4e4.pdfIn PDF document text
    • http://pekanage.greatdeerchase.org/uploads/1/3/1/6/131637503/nezanaf_jifixagopipimo_gapuzuwekuvugel.pdfIn PDF document text
    • http://files.sunshinervparkdadecity.com/uploads/1/3/1/0/131069879/344306.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/1/0434/8359/4917/files/sipebiruxodunopevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0693/8266/files/the_indian_cinderella.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0263/6706/files/bottle_caps_for_sale_bulk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4266/7676/files/rain_bird_esp_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3803/8426/files/xezaxonumufuzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6717d0f-e34a-4e88-9735-a3f1636d0e13/zutugetilara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9236/8796/files/steve_madden_glasses_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3008/8360/files/kaxuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9234/9606/files/94528704043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/the_art_of_war_machiavelli_sparknotes.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_off00006302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6302 5096 bytes
SHA-256: 8ad35b8d91d192eb04dc65c26c7fe1f6d5bf62aaeb9690c70a8106a29213ee2d
font_01_sfnt_off00007425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7425 10816 bytes
SHA-256: bab7567e1b5d9d321619e71a656b86901a610a067cd416998e6b26359613474e