Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd7496040be0155b…

MALICIOUS

PDF

65.3 KB Created: 2020-11-30 15:37:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 630ebfef1bcbdd2df9b354f09868a391 SHA-1: dc9beb66d29eb0bb0f4ef48871746668f468529d SHA-256: bd7496040be0155bbaf089e5e4d0f5156d85e50a161b0d4df329bccb2112a45f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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://trafffe.ru/strik?utm_term=classic+army+airsoft+guns+for+sale PDF link annotation
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/83e0b4f18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370051/normal_5f8b2c9487327.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/fezimexebitodugivife.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387699/normal_5f90ae4c0947b.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/lebaxa/nirenav.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/berklee_performing_arts_center_seating_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/liberalization_policy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0b22bdb-2b07-4889-8aaa-6da408e8a88d/2021487664.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/soaring_adventures_in_colorado_springs.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/xogikadofidasiwib.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/neoliberalismo_en_chile.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/moviredi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8913c9e9-5540-4b74-bcaa-40e7ce2b711b/fupumederudiziki.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/vudijigubexonesiso.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/pes_18_mobile_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/lorain_county_auditor_real_estate_transfers.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_off0000c187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC187 5208 bytes
SHA-256: 5ab848e6c79c1d6bbfda2a12c659f6218aa5c2c7c69f1ef9a31e8a683492137c
font_01_sfnt_off0000d332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD332 10908 bytes
SHA-256: d8c8816fcb1fb073ccba2f268f871d7e1b39e94d490ca8f75d86a83bd4a128ec

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