Malicious PDF — malware analysis report

Static analysis result for SHA-256 4224146d53a859d5…

MALICIOUS

PDF

69.4 KB Created: 2020-10-06 10:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8b3c5c053fadae5175e6197e19738223 SHA-1: f366d8699de2a627689c1041351e2ca4f848c09c SHA-256: 4224146d53a859d5726efda09715cf1898ca52434d72316a17fc244b91ad4cc6
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=economist+democracy+index+2019+pdf In PDF document text
    • http://files.bayoulesfleurboutique.com/uploads/1/3/1/4/131406510/e299d60d0353c65.pdfIn PDF document text
    • http://kodazomo.sabhfoundation.com/uploads/1/3/1/4/131406071/313e572f9764.pdfIn PDF document text
    • http://zamuru.kansasgiftededucationdatabase.com/uploads/1/3/0/7/130775027/dodamarudaguxifegob.pdfIn PDF document text
    • https://site-1037086.mozfiles.com/files/1037086/85130154571.pdfIn PDF document text
    • https://site-1038815.mozfiles.com/files/1038815/87597764700.pdfIn PDF document text
    • https://site-1036750.mozfiles.com/files/1036750/barowekazevafi.pdfIn PDF document text
    • https://site-1041851.mozfiles.com/files/1041851/viraveregusovixapun.pdfIn PDF document text
    • https://site-1048245.mozfiles.com/files/1048245/73146049069.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/1/0431/7590/3392/files/4_pack_abs_male.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/6716/6886/files/iron_blade_mod_apk_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5461/9560/files/nagipax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/3685/2633/files/living_with_a_seal_david_goggins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/0127/8374/files/one_sample_t_test_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c5ed023-3154-46e2-8ea0-9a7ace71747a/70107400451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0133a98-4a46-4907-b1bf-beb0010db293/sosoxemoku.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_off0000cfa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA0 5880 bytes
SHA-256: 0659f238bf8f4d78263c3432590f9b6f908cbb651b8223c6c3e97b82a34ee887
font_01_sfnt_off0000e399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE399 10704 bytes
SHA-256: ebb4b81b5540650a4004425dca385421bd93114f9ffdf8008921645dfe4d5921

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