Malicious PDF — malware analysis report

Static analysis result for SHA-256 35020ffdd9005269…

MALICIOUS

PDF

71.5 KB Created: 2021-03-03 16:55:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9aa0ae354544454b911c4a16c8ed0c4f SHA-1: a8935b64612f9382d56882887c228eb2768cb2f3 SHA-256: 35020ffdd900526937a4cc9a64d6f86590511796aeef22136ec12edec8136058
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://dafemum.ru/award?keyword=simple+present+exercises+pdf+com+gabarito In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5fd1cdf7b1c10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410015/normal_5ff4a8d359011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470016/normal_603c836e547f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481275/normal_600735f4bcf9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420600/normal_60160b50b7185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5fd3a0cd4350f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466664/normal_603bcfb1347d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471236/normal_600d429583041.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409627/normal_5ff58945bd188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495385/normal_602888ce449ec.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/dosipive/jomese.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/tricuspid_regurgitation_treatment_guidelines.pdfIn PDF document text
    • http://fukasutatota.rf.gd/how_do_you_make_a_stolen_car_yours_in_gta_5_online.pdfIn PDF document text
    • http://nawaroxepemif.epizy.com/platform_bed_frame_queen_ikea.pdfIn PDF document text
    • http://pitupeg.epizy.com/ivy_global_sat_2_hr_diagnostic_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_off0000d9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F5 5788 bytes
SHA-256: 3773426f01f03d5c899ec9853e63ec274b074181e10a7489625ce918df7fc392
font_01_sfnt_off0000ed93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED93 10364 bytes
SHA-256: 8a595a52ee492b04fcc67d10a46b151dd51664ac7cc9dde94d3703b210c51ddb