Malicious PDF — malware analysis report

Static analysis result for SHA-256 64fea35f53e357f5…

MALICIOUS

PDF

69.1 KB Created: 2020-11-19 02:33:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d238dfa00a746eceb571c2a2c64df460 SHA-1: d6d910227a742b14a42500d36739d6aad6a2752d SHA-256: 64fea35f53e357f5e497be908b9cddf9922c5b9c5c0ef9ef38a011e6a84bac97
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=match+word+to+picture+worksheet PDF link annotation
    • https://pozuxopukemo.weebly.com/uploads/1/3/4/7/134705319/e36c4f139d.pdfIn PDF document text
    • https://nubagusajol.weebly.com/uploads/1/3/4/2/134235051/ronodajigijirudupep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5fb40477dc1cf.pdfIn PDF document text
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/f168914d639d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5f9076a61ae16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f8a64c989f29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469837/normal_5faee5743c1c6.pdfIn PDF document text
    • https://zidajikivumab.weebly.com/uploads/1/3/4/6/134625594/lowitepo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414869/normal_5fa37490e3092.pdfIn PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/2385161.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/sakaburepagase/pay_reinstatement_fee_online_michigan.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/tidewater_community_college_rate_my_professor.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/miwanakosadewozus.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_off0000d19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19C 5288 bytes
SHA-256: 884ffb92a3d89027ad23b95ffa0daadb75cda1766ac11eb439b6eeca5852405a
font_01_sfnt_off0000e3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AF 10512 bytes
SHA-256: 3c32afee447d47224ee0104a25af4311aaac8cd6a1edf740ed064b89bdff5884

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