Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd786f1823caabc5…

MALICIOUS

PDF

73.5 KB Created: 2020-11-22 01:34:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2415b84fb135878e91840b5336314f45 SHA-1: d82e11c5c9abd0ce988c7790494f1fdae88889c4 SHA-256: fd786f1823caabc5476a2d49747284cbf157ad6af195b33fd56e2fe474b3fafd
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://traffine.ru/123?utm_term=viaje+al+centro+de+la+tierra+pelicula+completa+en+espa%25C3%25B1ol+latino PDF link annotation
    • https://mijelowiwiloz.weebly.com/uploads/1/3/1/1/131163856/1818420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412762/normal_5f9d0415ba3b2.pdfIn PDF document text
    • https://direnebem.weebly.com/uploads/1/3/4/6/134641367/bad2634c2d1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376598/normal_5f982be7791df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368985/normal_5fa5be5a39c31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381976/normal_5f8cf76d3b048.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/luresimosip/facts_about_queen_nitocris.pdfIn PDF document text
    • https://s3.amazonaws.com/tipakalif/jeff_huson_wikipedia.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/sample_descriptive_paragraph_about_a_place.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/mini_jambox_pairing_rejected.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/28903601519.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/temple_college_library_database.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/basel_3_lcr.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/nigevamefapifibivekuna.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/ascii_hex_table.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_off0000ddc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC5 5472 bytes
SHA-256: 2e4f24604f235afaef13318a09f78be5228b2549f20e4b931cd3b9c918c08257
font_01_sfnt_off0000f013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF013 11560 bytes
SHA-256: b68ba579fbe50423f302eb9fc3a39e2028ebd8b63a1efc9f8bd8cfa46d3e7aa8

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