Malicious PDF — malware analysis report

Static analysis result for SHA-256 6580a008902cd029…

MALICIOUS

PDF

40.7 KB Created: 2020-10-01 13:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c383b5e483bce8d7f1024537bf4d4874 SHA-1: 6d7d0a72b1260259df479db73192bb148c703eec SHA-256: 6580a008902cd029ec7c07e753e2fcd25f9a6440b2229e987c32049f8ac6fbde
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=ap+psychology+sensation+and+perception+practice+test+pdf In PDF document text
    • http://files.livingtechniques.com/uploads/1/3/0/8/130874254/xukezogulomafin-lamez-tonofajazofege-poxefis.pdfIn PDF document text
    • http://files.pwca-va.org/uploads/1/3/1/0/131070618/d7947267c.pdfIn PDF document text
    • http://vakonow.doublejoutfittersny.com/uploads/1/3/1/6/131606271/2717341.pdfIn PDF document text
    • http://wowezok.frhsbands.org/uploads/1/3/0/8/130814328/gevekix-suxegiba-tavasobonetoser-suraludiz.pdfIn PDF document text
    • http://files.cherishcards.com/uploads/1/3/0/8/130874541/8e732ed118.pdfIn PDF document text
    • http://fujiw.saharasistasols.com/uploads/1/3/1/6/131606523/6535634.pdfIn PDF document text
    • http://files.bellycomesfirst.com/uploads/1/3/1/6/131637104/padadubegoseka.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/98346b93-148a-4c74-88e8-b2fbddeba50b/kazisofesometiredodal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5f5a396-16bf-407b-ae02-45bbe79c62f2/lisedadifelirexiju.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_off00005f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F67 5508 bytes
SHA-256: 911ca130b49f37f71544f09086e17f298aca0abbbaa3174ace43acbd68969f19
font_01_sfnt_off0000722a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x722A 9996 bytes
SHA-256: 4676a1e44cdacda226b7fe5e6e98847b9e72b164fd2d6e51faf76c9b405618a1