Malicious PDF — malware analysis report

Static analysis result for SHA-256 961e820cbaae4f71…

MALICIOUS

PDF

72.3 KB Created: 2021-02-25 17:06:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e6043a52529c222ba489fee0294e3cac SHA-1: 2134395f01ed1bfbd36d74b549bf96ab6e65b011 SHA-256: 961e820cbaae4f714049a97bd5c8c7e624b0f336f48e9ffc516f2893e5ab9387
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/award?keyword=how+to+balance+a+top+loading+lg+washing+machine+drum PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383797/normal_6034418cae59b.pdfIn PDF document text
    • https://cdn.sqhk.co/vituxezij/igcgc2Y/search_quran_in_roman_urdu_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479462/normal_5ff256c750017.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388160/normal_5ffb6aa3d3b7d.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/PjgegfM/mens_red_button_up_short_sleeve_shirt.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/heC2cie/gitizewiparuzibefi.pdfIn PDF document text
    • http://sebokuxaxugu.iblogger.org/fixosewofesivabeliz.pdfIn PDF document text
    • https://cdn.sqhk.co/resesexiraf/aibQuXJ/cake_decorating_courses_online_uk.pdfIn PDF document text
    • https://guxulixekakuved.weebly.com/uploads/1/3/5/2/135294256/4387802.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/tazopaju/85904759088.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/51569256087.pdfIn PDF document text
    • http://todibosopif.epizy.com/what_is_not_a_representative_term_of_the_definition_of_public_relations.pdfIn PDF document text
    • http://jugututinotu.rf.gd/fastanime_watch_anime_online_tv_apk.pdfIn PDF document text
    • http://vubimefiz.epizy.com/dungeon_master_2_guide.pdfIn PDF document text
    • http://semewefiji.rf.gd/going_to_worksheets_esl.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_off0000dc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC89 5680 bytes
SHA-256: 6a3fc6f86ed5c1ce7872a8773670835ee4530a96bf53d85c46b8beb6f89424da
font_01_sfnt_off0000efb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB6 10720 bytes
SHA-256: 032500d607f935d35fbe4685157de81fa986df5b541bbc057d55519ab64f02a8