Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9d1329d18321c43…

MALICIOUS

PDF

70.8 KB Created: 2020-11-17 10:48:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 39202a86e5c34a35fe17085cdf2e63a2 SHA-1: 23737306c9238959f3be623e3632d22cb9d410aa SHA-256: b9d1329d18321c43140603c6407dd4fd7555a9a3c48881c44abe7ef672a6126c
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://trafffi.ru/strik?utm_term=dungeons+and+dragons+4e+monster+manu PDF link annotation
    • https://ziwugedaxuz.weebly.com/uploads/1/3/4/5/134501511/109394.pdfIn PDF document text
    • https://fizozedodid.weebly.com/uploads/1/3/4/4/134484686/7724314.pdfIn PDF document text
    • https://bupaduzisi.weebly.com/uploads/1/3/4/4/134475958/tukasafigipeleg.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/dujulovukopofelig.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/5854702.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/megelugik/cambodia_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/413f8bbe-e199-42a3-bc9a-1a350d5c6f9b/2319990605.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/xibaxumijidevozivirekak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31924a04-a30d-47f3-b7b3-b5cfae48f2fb/86925390649.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/mean_street_ministries_resource_guide_denver.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/pakakodalugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfd8aa8d-3da5-4165-ab49-9db708470b56/9842888947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ca4ca35-41d4-4b7d-af67-e86da2c4bf07/43422537051.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_off0000d8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FF 5200 bytes
SHA-256: 203ac53cba87213fba8c7842ce7cc1ebde648ba9ef6a8bf860af2acb966238dc
font_01_sfnt_off0000eaa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA6 10744 bytes
SHA-256: 5d2c8115b03969ad6302d53eb4ed061f50559805356a145e86556ee08d6b2c85

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