Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a624d4f274bfa76…

MALICIOUS

PDF

71.3 KB Created: 2021-04-12 22:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c26be7bd143a5867af7c874ca736e422 SHA-1: 572551bb0a9e3a9233e986d7d203ca81d3939d12 SHA-256: 7a624d4f274bfa76831ac995c2148d989d4457afe48e9e4cd84f411e55af1126
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 0.9996

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://vilenefex.ru/strik?utm_term=2013+dodge+charger+alternator+price PDF link annotation
    • http://xepewifub.mygamesonline.org/definio_de_atmosfera.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465269/normal_5ff2dce5c0e77.pdfIn PDF document text
    • http://moxawunanenubop.sportsontheweb.net/abc_alphabet_chart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459028/normal_603b971dc84fa.pdfIn PDF document text
    • https://vipapixamez.weebly.com/uploads/1/3/0/8/130814430/7655908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_606a37ad4c291.pdfIn PDF document text
    • http://vekisonoloze.sportsontheweb.net/solvent_polarity_index.pdfIn PDF document text
    • https://tanuroxej.weebly.com/uploads/1/3/4/1/134131309/lawup.pdfIn PDF document text
    • https://xuxerativizujaf.weebly.com/uploads/1/3/1/0/131070719/xutezejeneve_mofofurir.pdfIn PDF document text
    • https://wujezevo.weebly.com/uploads/1/3/0/8/130874127/gepufanipikuvi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481852/normal_5ffe0152b45d1.pdfIn PDF document text
    • https://wogalipa.weebly.com/uploads/1/3/4/3/134316604/livafabaxiwinemu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374198/normal_5fda293d499bb.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/poguvelefa/great_gatsby_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/kokatosozofosobeto.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/bar_interior_design.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/kilefafogatek.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/tissot_watches_t_touch_set_time.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/93995384420.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/xasewilixisuduniza.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/core_java_tutorial_for_beginners.pdfIn PDF document text
    • http://senawoxagijajo.onlinewebshop.net/website_design_and_development_proposal.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_off0000d5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E0 5552 bytes
SHA-256: 9e8089ecf8574617fcdd800610328bc06d79999af5ac189d6f030887a7bfd798
font_01_sfnt_off0000e8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C2 11304 bytes
SHA-256: 33d4322d92f3c0c9b1c86d5041ab6771a8eda59844d9efb5d8f2b22d4dc200bf

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