Malicious PDF — malware analysis report

Static analysis result for SHA-256 e71e023b1f604440…

MALICIOUS

PDF

67.1 KB Created: 2020-12-16 08:54:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 29155183562667fd3fce563bf86c66c2 SHA-1: 9ecc6383fcbc4faa429f471699add2a702b27455 SHA-256: e71e023b1f60444043b8c473d51d02f816ac728f2312b0b7c6d102d93f258e5a
186 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafficel.ru/wb?keyword=reference%20letter%20phd%20template PDF link annotation
    • https://gonalibage.weebly.com/uploads/1/3/4/6/134652093/9837419.pdfIn PDF document text
    • https://gupekuvexo.weebly.com/uploads/1/3/4/6/134610658/4193980.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/velelatazotib_muzepin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423148/normal_5fd99882e9e14.pdfIn PDF document text
    • https://nilesezijifata.weebly.com/uploads/1/3/4/8/134885493/kivurid.pdfIn PDF document text
    • https://jokatilowiwege.weebly.com/uploads/1/3/4/3/134369617/fumizozofuxa_zuzizu_lugeromaxeg.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/3bc785b6-297b-4cd5-b58a-1e55d86d3153/84931970778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdd5a0fe-6a46-41d9-ac6a-489f47b2b3bc/wuxitupejututejilovedared.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c902ed09-526d-4d0c-add8-0172daf20697/fokisifusini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c13a584c-4f80-4e26-9415-df479fb13842/windows_update_service_not_running_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85cb2e5d-5c56-440f-bd1a-7f9ac99b34b8/56514167612.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/bowasix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0d48c14-fd9a-45c3-adba-6a6daf4356c7/cuevana_2_espanol_peliculas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bef28fa-efae-409d-b21b-ed51b42b47a1/17396758281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03ab2795-1e99-459e-a40f-bf6ccd6262bd/engineering_mechanics_dynamics_8th_edition_meriam.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_off0000ca2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2B 5224 bytes
SHA-256: be739a8669a698e47e854310e40f37f70f456084e5df85ed8ffdd7816529716e
font_01_sfnt_off0000dbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCA 10532 bytes
SHA-256: cbb89a82f56b86e4209035cfdc6bf8420dcf001d1ccc777ca29b61a41f8871da

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