Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8828f9e8e8d2849…

MALICIOUS

PDF

69.9 KB Created: 2021-01-08 14:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0da133e04a509885228a874d26285ccf SHA-1: 4be09f5cf6e76616d7d663c9ea350a09a642c237 SHA-256: e8828f9e8e8d2849d7ed0e72bf2eaef7f3dfdcaaeedfed8359e87fc3cf13ac29
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/wb?keyword=best%20romantic%20flute%20ringtones%20free%20download In PDF document text
    • https://cdn.sqhk.co/nuzinipaz/bcTFDih/3d_car_wallpaper_hd_1080p_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/posogamumut/genU3Uu/wejamejisuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417543/normal_5f98797f27e48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412413/normal_5fa93617ed4d5.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/xuxifuzituwu/blackberry_bold_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/internet_manager_registration_patch_file.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/mathematical_physics_lecture_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/79517749086.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/68745283038.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/29158431733.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/xujokikid.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/55215325139.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/buwikaxemigozejotate.pdfIn PDF document text
    • https://s3.amazonaws.com/juxatop/68115846931.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/ielts_speaking_topics_with_answers_book.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_off0000d1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CA 5484 bytes
SHA-256: fd40cb124fefae7bfd3922a91f18e290fefa26f55050d6dc397394a1ab4254fa
font_01_sfnt_off0000e469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE469 10592 bytes
SHA-256: 555ca3629a587055587078a8838fbe26930690fa4b04c9933f7aa017ed172679