Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d1980466c1bf8c…

MALICIOUS

PDF

75.3 KB Created: 2021-01-10 20:35:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8142c856bc9355781a07d589b426c335 SHA-1: ec7b79df6312bfee88745253e4aa945f60ce1295 SHA-256: c0d1980466c1bf8cfbb14462c0138442c0741a93686fcc312d74c6fd2f680413
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://traffking.ru/123?utm_term=does+australian+starbucks+have+a+secret+menu PDF link annotation
    • https://cdn.sqhk.co/xoradofexul/NEgjgjb/starfall_numbers_learn_to_count.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/hgggjep/60506767218.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379237/normal_5fcf7ab67ee03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478688/normal_5fb4042a6ed67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375083/normal_5f98dcd3ed65a.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/fXggiiK/23021293576.pdfIn PDF document text
    • https://cdn.sqhk.co/loboremetoxe/d9ggSOt/10405326223.pdfIn PDF document text
    • https://cdn.sqhk.co/pewovixosafu/gPRiaPi/photo_frame_collage_app_download_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380079/normal_5ff95a25cc353.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/c84743950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456663/normal_5fbba50e0e615.pdfIn PDF document text
    • https://zogumunatol.weebly.com/uploads/1/3/1/6/131636745/5469419.pdfIn PDF document text
    • https://site-1177929.mozfiles.com/files/1177929/new_artificial_intelligence_companies_to_invest_in.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/bunobu/great_smile_store_toothbrush_heads.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE702 5304 bytes
SHA-256: 7d153367a51aedf669f7c9fde5cd517682841d974d562434109e6c4eb34a8109
font_01_sfnt_off0000f8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EC 11752 bytes
SHA-256: 89e270b8d0624fdf8058eabd29c638784ebfc2b7ae5fbd9d401439ee64eaef31

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