Malicious PDF — malware analysis report

Static analysis result for SHA-256 47153acdc7ebfc18…

MALICIOUS

PDF

76.4 KB Created: 2021-02-23 19:41:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 59f80db452de89fedf3e738bd1d5482b SHA-1: 505a8ca9e4fe0f147392fd870ea8c68084c4d8dd SHA-256: 47153acdc7ebfc1829e6b4665af1a903ad179fb990592042bd70b129076f3e79
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the external URLs, 'https://druttle.ru/123?utm_term=rival+meat+slicer+1030v+manual', is flagged as an external URI. The ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' and the ML classifier output strongly indicate malicious intent, likely related to phishing or hosting further malicious content via the link farm.

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://druttle.ru/123?utm_term=rival+meat+slicer+1030v+manual PDF link annotation
    • https://givurili.weebly.com/uploads/1/3/4/6/134605008/3259267.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473041/normal_5fee6477ca498.pdfIn PDF document text
    • https://visoruze.weebly.com/uploads/1/3/4/1/134109001/doruxoja_wipetepefopi.pdfIn PDF document text
    • https://tuxipowu.weebly.com/uploads/1/3/4/6/134699968/c879a61f976e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427523/normal_601bd34e4391b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383922/normal_5ffe73ccd5ac1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389352/normal_602ae3ed4bf36.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/dibedamoka/22413478957.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/neet_2019_answer_key_aakash_q5.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/sizunuridawir.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/wejapusolimasemarepu.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/39577828522.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/rarowinutijuzupujadax.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/football_score_sheet_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/astrology_answers_aries_daily.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/26826715373.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/xalutewujakefabipejero.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_off0000e908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE908 5372 bytes
SHA-256: 388d48c1c71dca0761ce866f59a6257e813cd7c13588c6bdecdc51309fc90117
font_01_sfnt_off0000fb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB43 12232 bytes
SHA-256: acdc4a2403f1509e16964f588ee65115021d5ebf9095e5b57d26e2a17118ce96

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