Malicious PDF — malware analysis report

Static analysis result for SHA-256 79edc290b121777d…

MALICIOUS

PDF

73.7 KB Created: 2020-11-13 05:25:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c4bf63387ef6cd38dab87d16a6f3404f SHA-1: 4bc77ba9f5616018233cd9f8008ba5b2ca146a89 SHA-256: 79edc290b121777da58d2abebdd7ae1160cd303f8d94ad9e457289add101a7b4
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/123?utm_term=kindergarten+phonics+workbook+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393483/normal_5fad2e5874a8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423188/normal_5f986223486fb.pdfIn PDF document text
    • https://paboludozov.weebly.com/uploads/1/3/4/3/134333588/933590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f8766afe206d.pdfIn PDF document text
    • https://gazerotofutoda.weebly.com/uploads/1/3/4/6/134665132/2530823.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383577/normal_5f98a94bf0cca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458144/normal_5fa9e25aa6cb5.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/jenisozazewubo/eu4_guides_castile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9c53ece-97b9-4958-9410-a60a01024e30/honda_gcv160_5.5_pressure_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/9505542863.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/xafowuror.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/vuwexukozuxuxebolobome.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/16409635661.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/12437541338.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/murder_mystery_values_2020.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_off0000e278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE278 5652 bytes
SHA-256: 2803b1d2d6adfc037d157efba0de0052a8a46426863d98a8ea57a032d7c08045
font_01_sfnt_off0000f5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B4 10732 bytes
SHA-256: 867c3912ba68a3b014142c3720c2bafa094d223a1825dcb925c0b1e0e49de6c4