Malicious PDF — malware analysis report

Static analysis result for SHA-256 0290b23610a2f61e…

MALICIOUS

PDF

74.2 KB Created: 2021-01-15 04:56:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: dec2fe225a721460c89ad899d2327d68 SHA-1: 98c90ac05b9377484296386c618eca81b12968db SHA-256: 0290b23610a2f61e1a800a2d9b7b34c83f5c9ce57373e911972e4867b6cc2614
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://traffset.ru/123?utm_term=daisy+head+mayzie+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484114/normal_5ff5483961878.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457305/normal_5fe27a8b00f83.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480582/normal_5fe4c57c0bf1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501229/normal_5fd77e5e0be14.pdfIn PDF document text
    • https://bidoruwo.weebly.com/uploads/1/3/4/6/134651737/muxuzesatijabe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465392/normal_5ff03e74837f1.pdfIn PDF document text
    • https://fedofiri.weebly.com/uploads/1/3/2/6/132681193/biretugez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501791/normal_5fb34f02d5a49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390638/normal_5fe795cf414ab.pdfIn PDF document text
    • https://fogisitulen.weebly.com/uploads/1/3/0/7/130775537/jefivekafexapap.pdfIn PDF document text
    • https://fawewetipe.weebly.com/uploads/1/3/1/3/131379545/seviba.pdfIn PDF document text
    • https://nasuvanebi.weebly.com/uploads/1/3/5/3/135393195/2de5291aebb.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/gavexilatuvitaz/bengali_movie_site_online.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/zizobimumigo.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_off0000e499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE499 5304 bytes
SHA-256: ea7fc6e4dd3644a033d4792fff78f381cdc83a2d84f1147465c2ebbd4a4c9ed0
font_01_sfnt_off0000f69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69B 10984 bytes
SHA-256: 86384337bfd3218458c6f985811a10267a4144b86910c5af3053c2b1bd6e656f

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