Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e29fc3be6accb1…

MALICIOUS

PDF

44.5 KB Created: 2020-11-09 15:02:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 0d3c88aab59efcad42ca12f1e4a59a0a SHA-1: 5ba587263022f68bd7330f53e5905ecd95899c47 SHA-256: 68e29fc3be6accb1a486e3f72bad16e2d1ba57f59a74f50900119372b54d498e
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://traffking.ru/strik?keyword=edenton+high+school+nc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377377/normal_5f8a68d92699b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383568/normal_5f909e7135e11.pdfIn PDF document text
    • https://lupolaluxu.weebly.com/uploads/1/3/2/6/132681144/4522353.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc3673ad-83f5-4c36-a693-0eb279b35b6b/cordless_angle_grinder_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76ce8326-f3da-4ebd-afdd-201b250c5e7f/buzakuvazalilob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec48e3d0-de91-45f4-9132-bf0d4a2de134/73762768026.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98fb1489-bed3-4f52-bd10-1cd990926323/denitebarimodiv.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/wafaluwunoremubefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a76af57-d3d4-4942-8643-14645d31b3d2/89361496679.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/hitchhiker_s_guide_to_the_galaxy_epub.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/bullying_in_schools_articles.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/1998_ap_calculus_ab_free_response_answers.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_off00006fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA6 4852 bytes
SHA-256: 5ffb9521f0c8ecfd2f50024a85607f4f9e955c6fe3ce1719a4c5559e49ec0a30
font_01_sfnt_off00008036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8036 10916 bytes
SHA-256: d04c3465267a5747edc299974e9afb83a0e1311745a0ec9a6f08b47c16029fb9