Malicious PDF — malware analysis report

Static analysis result for SHA-256 d28108f5094467e0…

MALICIOUS

PDF

68.2 KB Created: 2020-12-08 19:19:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b0a50c440f82c0755b4a71503f314e07 SHA-1: c4f5e9687431c6d0d4885d546c9db646d6f6ff11 SHA-256: d28108f5094467e0070e4a8f0c3c608c27c0891ecfb324b2bc969fd46496e678
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://trafffi.ru/wb?keyword=all%20network%20packages%20apkpure PDF link annotation
    • https://nozezekotelipub.weebly.com/uploads/1/3/4/8/134883262/8987855.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/1bf9fe786c5ed4b.pdfIn PDF document text
    • https://zugozoriv.weebly.com/uploads/1/3/4/7/134770463/dajafenad.pdfIn PDF document text
    • https://faxevirasobiv.weebly.com/uploads/1/3/4/5/134597887/5558668.pdfIn PDF document text
    • https://ribafiligizeki.weebly.com/uploads/1/3/1/4/131438260/kerepos_dazafisoxesafi.pdfIn PDF document text
    • https://kobexozabegubom.weebly.com/uploads/1/3/3/9/133999893/rijolage.pdfIn PDF document text
    • https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/nivivexusimemu.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/a5315a633a034.pdfIn PDF document text
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/09d4b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/57ef0418-f83d-4566-af9e-1a2d7c660287/89096729413.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27e990a2757459bed0688/t/5fc6ace108845d092477b3e1/1606855906154/bafisowo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf543eeaf37e3b6492a98f/1606374463968/77203820625.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10fb5bda9c57a97bf17be/t/5fc1836961e25426e1717554/1606517609792/razanodipiloxarupaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17a85f08-9007-4ec1-b87d-d9b19b020356/72994670101.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf31cb474932ca266a4ca/1606218524997/weather_in_montego_bay_jamaica_in_august.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_off0000cc1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1D 5244 bytes
SHA-256: 8afbc43e3da067d9af4d65e4f0f9967e3749dbf22bd762b02eb108e102f9d8a9
font_01_sfnt_off0000de1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1C 11692 bytes
SHA-256: 5532c3a3a0b02ce8c12f04273ce5d6fd77219de5695745754315e5c6a92660a8

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