Malicious PDF — malware analysis report

Static analysis result for SHA-256 92731c1a52a95019…

MALICIOUS

PDF

67.3 KB Created: 2020-12-16 07:02:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 93fa64fe5593fb15228e344242a33fda SHA-1: 4ae55ce1de4bc6fcc1f3a5c00c5826fdbea5470b SHA-256: 92731c1a52a95019f4fe877244340e44d5d02293dae8ef8adbd7a000f2c49a0c
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/aws?utm_term=keto+recipe+book PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369903/normal_5f90d53b53f21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f95fbe7b0966.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417023/normal_5fb98e6d122ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_5fa5daa73ebeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411219/normal_5f992a55eaabf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488323/normal_5fb9cbdabda17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375194/normal_5fa6955b47ad3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f8e62382e5fb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/84191357385.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdde846d-d446-4660-acfa-94002c129a32/definition_of_ratify_in_law.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce520682-5ff2-48a4-8ed7-cb241b179452/3_estates_of_france.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50faebdb33045eedcf231/t/5fc51ea061e25426e1db3638/1606753952227/baby_pool_float_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c58832d5-2710-43e7-8f89-dbba94bae489/ganufadi.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/canon_camera_connect_app_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2079df53-871d-4377-b90b-9a9628deef22/rawilofenefidigumofabu.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_off0000cdcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCF 4680 bytes
SHA-256: fcf1629f993a0f6ca3eaf2822b99cfb5d5b0f9172def0650e73db59f9399ab97
font_01_sfnt_off0000ddca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCA 10160 bytes
SHA-256: f588cc67c188384405c1b442ea7d3d88bf3ede278324c49f4c42b865f8c4f0b6