Malicious PDF — malware analysis report

Static analysis result for SHA-256 52afeb9796da2895…

MALICIOUS

PDF

65.8 KB Created: 2020-11-23 20:51:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fba340ac2472927affc5cfc020b5ba98 SHA-1: 2182d40ad5add05c7c05929b9d339ed8317436ae SHA-256: 52afeb9796da2895331fe7e1d7a9b444ab1544e40f4daf3f210063d3715a8daf
156 Risk Score

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 0.9995

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=bodyboss+method+fitness+guide+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414848/normal_5f9b371518afa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418362/normal_5f9823db08316.pdfIn PDF document text
    • https://waxovabuwemox.weebly.com/uploads/1/3/4/5/134585519/435854.pdfIn PDF document text
    • https://warobakun.weebly.com/uploads/1/3/4/4/134486798/6ef5d009f40c1.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/afd91.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/xumilulefiva.pdfIn PDF document text
    • https://gawosiluzetur.weebly.com/uploads/1/3/4/6/134631715/gipowusafumazi-gedogawi.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/sepawi/binomial_distribution_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/tojojozirozigem.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/new_hartford_police_blotter.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_off0000c258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC258 5408 bytes
SHA-256: 1d0f626ed361830aed57c77f508b5503b93d5010ce3c75709895bb6ab77f4492
font_01_sfnt_off0000d4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AD 11088 bytes
SHA-256: 0c8dd9e1a11c206626a964e3e186c6ac6010d0b5699c8dfce36879eaf057d56b