Malicious PDF — malware analysis report

Static analysis result for SHA-256 4803734eff7a37aa…

MALICIOUS

PDF

70.9 KB Created: 2021-02-12 22:41:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 27c55b2ae987cd17dc7707ef398a5385 SHA-1: 4e8e9259d52520a52b8b0753b16b39847e8fab69 SHA-256: 4803734eff7a37aac54c598193e27a19c6128be3aa8956f6ff0d5805f76d8fc0
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • 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://leonvi.ru/wix?keyword=case+files+obgyn+5th+edition+pdf+download PDF link annotation
    • https://fiwaxajosikevi.weebly.com/uploads/1/3/4/8/134885015/34a3c96db5ef.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/idzjcgc/89854544741.pdfIn PDF document text
    • https://cdn.sqhk.co/janezewufaj/idK4UlW/leather_furniture_interior_design_ideas.pdfIn PDF document text
    • https://dabusoze.weebly.com/uploads/1/3/4/5/134585091/3561914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389599/normal_6018bf53a7286.pdfIn PDF document text
    • https://namobilezivi.weebly.com/uploads/1/3/1/8/131857476/wowimuzixak.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/hboMyRe/euro_truck_simulator_offroad_cargo_transport_pro_rexdl.pdfIn PDF document text
    • https://nawopudupavipe.weebly.com/uploads/1/3/4/8/134856820/21dc012f6af9.pdfIn PDF document text
    • https://delupizamima.weebly.com/uploads/1/3/4/5/134578079/bajotofobufik.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/dotivaf/61341907603.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/murafuvozazipuvu.pdfIn PDF document text
    • http://nonulalomijowo.epizy.com/25288612526.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/postal_code_usa_format.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/32738415956.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/83007302133.pdfIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/template_for_small_business_expenses.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD746 5568 bytes
SHA-256: 5850c47e95bd820418bfe66cc37bf535ae3c3d5640622e379b505337cb637d89
font_01_sfnt_off0000ea45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA45 10516 bytes
SHA-256: 7be761e79b79010ea814c40f5d54348a7f8107df0713227f4d6ec2f566c7c732

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