Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e9ae2e93aa1935a…

MALICIOUS

PDF

68.5 KB Created: 2020-10-07 16:34:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 796dc97ca1ba229d391bdadfe8cbdaaa SHA-1: a7ddf023b6bd85550c4e89ace81c8bee20c2aafc SHA-256: 5e9ae2e93aa1935a115f0c82a8e33344cd98cd3ac82e6adbdd0fd1e0e4ed00d6
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://ggtraff.ru/strik?keyword=hitchhiker%2527s+guide+to+the+galaxy+radio+theme+song In PDF document text
    • http://files.wcrwestmichigan.com/uploads/1/3/1/4/131407110/sopidefove.pdfIn PDF document text
    • http://jolife.travismanson.com/uploads/1/3/0/8/130874175/50655370cce3a1.pdfIn PDF document text
    • https://site-1038765.mozfiles.com/files/1038765/95057905520.pdfIn PDF document text
    • https://site-1042448.mozfiles.com/files/1042448/larev.pdfIn PDF document text
    • https://site-1038602.mozfiles.com/files/1038602/jomubojevalokob.pdfIn PDF document text
    • https://site-1044016.mozfiles.com/files/1044016/28786446264.pdfIn PDF document text
    • https://site-1040251.mozfiles.com/files/1040251/31125760819.pdfIn PDF document text
    • https://site-1037192.mozfiles.com/files/1037192/21458738494.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/1/0436/9648/8613/files/borah_high_school_counselors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/1663/3750/files/whirlpool_cabrio_f2_error_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/7380/5982/files/reading_phils_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/guilford_county_register_of_deeds_north_carolina.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_off0000c31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC31D 5580 bytes
SHA-256: c46e675ff43eb098c149e04e9192222a149f9ce8d63f64b82c07b29629f24523
font_01_sfnt_off0000d5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FD 15240 bytes
SHA-256: b70aa1a7dda87f26638a3216295ac27fdf99b8f1d14b1d43cec152a35f360476