Malicious PDF — malware analysis report

Static analysis result for SHA-256 94589aeaeef1b3e0…

MALICIOUS

PDF

40.8 KB Created: 2020-10-14 03:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 23349211512763a52837884e7e49f1cb SHA-1: ec06c8e890d5cd0ab7b920f218845f61b91ccb54 SHA-256: 94589aeaeef1b3e03c12de85cb03246bc20fbd9261f05c16924c38502ec6de6c
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=ce+tech+tv+wall+mount+manual In PDF document text
    • https://site-1038861.mozfiles.com/files/1038861/bumuxal.pdfIn PDF document text
    • https://site-1044239.mozfiles.com/files/1044239/laloxasojaroxe.pdfIn PDF document text
    • https://site-1037079.mozfiles.com/files/1037079/91748184545.pdfIn PDF document text
    • https://site-1037827.mozfiles.com/files/1037827/vaseponubesixisin.pdfIn PDF document text
    • https://site-1039668.mozfiles.com/files/1039668/dotofuzanesapabejegika.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/1d1f8ecc085ca.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/runemevurexuziwone.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/1/0430/8706/9348/files/23128559453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8921/0781/files/primitive_christmas_tree_topper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/la_caverna_de_platon_ensayo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1901/7124/files/madden_mobile_unlimited_coins_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2192/2215/files/totinos_pizza_rolls_flavors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5423/8369/files/el_dorado_hills_movies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8177/0163/files/75-85_kg_to_lbs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3696/7063/files/2020_statesboro_artsfest.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1244/3290/files/volume_word_problems_worksheet.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_off000063f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F1 4824 bytes
SHA-256: 355876d3682c0bf4a1bb4bd23953b64fc0b33e4126192e5a2f83fb153ae1547e
font_01_sfnt_off0000744b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x744B 9952 bytes
SHA-256: 421592634212fa5f2fcc0ceea8f34ac5a66edddf1d43bb02db6a5b5d942e8209

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