Malicious PDF — malware analysis report

Static analysis result for SHA-256 98215ec74470ea44…

MALICIOUS

PDF

67.8 KB Created: 2021-02-27 03:18:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 35d0db96234a9987e9b0f4efb5dfba1a SHA-1: 7c6e7458f45e9be82a7d0264624c541877e7ab7b SHA-256: 98215ec74470ea4412520c4d0951b53d454ca16a39fac03b79de434926e96244
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://yafferge.ru/award?keyword=subject+complement+worksheet+6th+grade In PDF document text
    • https://jasujoru.weebly.com/uploads/1/3/1/4/131483343/91bf91.pdfIn PDF document text
    • https://radolawijukigi.weebly.com/uploads/1/3/5/9/135992833/187b04.pdfIn PDF document text
    • http://jevufoduxixan.22web.org/how_does_a_multidisciplinary_team_benefits_the_classroom.pdfIn PDF document text
    • http://pobijubak.iblogger.org/26865772936.pdfIn PDF document text
    • https://sekagerufelijet.weebly.com/uploads/1/3/5/9/135965199/07cf3c4d4517d2f.pdfIn PDF document text
    • https://nedilobimizedov.weebly.com/uploads/1/3/5/3/135346130/kugunapa.pdfIn PDF document text
    • http://mestorating.ru/718324873880cu52.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/9528309691157ctg.pdfIn PDF document text
    • http://zazerure.22web.org/free_cv_template_for_word.pdfIn PDF document text
    • https://tazivori.weebly.com/uploads/1/3/1/4/131438523/3534950.pdfIn PDF document text
    • http://tersq.fun/linofaye3b2.pdfIn PDF document text
    • https://losarofimet.weebly.com/uploads/1/3/1/3/131384333/2531095.pdfIn PDF document text
    • https://fumabufoduf.weebly.com/uploads/1/3/5/3/135313851/0899f9d1.pdfIn PDF document text
    • http://thrivewebs.com/toxaresewafibufuh4hkl.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/pirosisob/national_geographic_tv_guide_tonight.pdfIn PDF document text
    • http://bavalididot.epizy.com/wakejakofigineriveg.pdfIn PDF document text
    • http://zawunutisozapo.epizy.com/77608578758.pdfIn PDF document text
    • http://wavudipikudela.epizy.com/qualified_dividends_and_capital_gains_worksheet_2018.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_off0000cc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC89 6116 bytes
SHA-256: cd7d1671c9526dc0a6fbb23564e211836024d73b9b4eaa6036831ee2211420ad
font_01_sfnt_off0000e136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE136 9672 bytes
SHA-256: 6c5597abd694c3532f53da62fca1fbaacd64b1bbcf9d7a9637a1973255b69b04