Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e641bdef5834769…

MALICIOUS

PDF

85.5 KB Created: 2021-03-16 01:12:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d90733426218a644fd3f069f29000579 SHA-1: 58c75ec182cac8fbea35c571a4834f3d6f12f761 SHA-256: 7e641bdef5834769375ef5ba7c14d819e14c4d217c85126004e8e7fdfbe65357
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded URLs, particularly 'https://gimoguvi.ru/award?keyword=warranty+administrator+job+description+pdf', suggest a phishing lure related to job descriptions. The PDF also contains a link farm on disposable hosting, indicating a common tactic for distributing malicious content or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/award?keyword=warranty+administrator+job+description+pdf PDF link annotation
    • http://pixunune.sportsontheweb.net/84715424905.pdfIn PDF document text
    • http://fumexijana.getenjoyment.net/microsoft_office_table_of_contents_tutorial.pdfIn PDF document text
    • http://wagijap.22web.org/learn_korean_book.pdfIn PDF document text
    • http://bomepufibawil.scienceontheweb.net/79462211253.pdfIn PDF document text
    • http://kawasus.scienceontheweb.net/ruger_lcp_380_custom_review.pdfIn PDF document text
    • http://valuburikodajad.medianewsonline.com/diropozuvoritijeb.pdfIn PDF document text
    • http://zikewexer.scienceontheweb.net/11856501038.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/cheese_pasta_recipes_vegetarian_indian_style.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_deb8485f98804ccf99277e0ae104c3ee.pdf?index=trueIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_afcda9c0ca964116b6b50d1926e1acc1.pdf?index=trueIn PDF document text
    • http://kubowulurarekij.myartsonline.com/perilorometunoloxata.pdfIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_59f2e177f0d04bb2affa68ae57cabc9e.pdf?index=trueIn PDF document text
    • http://sukokovevaz.atwebpages.com/2940622229.pdfIn PDF document text
    • https://5e73d190-47a4-4ead-99bf-7e9069f06a16.filesusr.com/ugd/55cc32_4166b3d40d41421488a2e3c8724b7821.pdf?index=trueIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_336035b66b414c9a8a0575bc3f664b3c.pdf?index=trueIn PDF document text
    • http://jitikatul.rf.gd/autumn_leaves_lead_sheet.pdfIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_5951d66ae8d34640a81c2c84e02d10fa.pdf?index=trueIn PDF document text
    • https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_9bd66fa9785047edb6763608510648e9.pdf?index=trueIn 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_off000110ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EA 5600 bytes
SHA-256: 3eeaa7b05c5c4a02fbec0d5f65221f03958ace9a063972005f7056ee22ca32d1
font_01_sfnt_off000123f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F7 10836 bytes
SHA-256: a1b26aa954041afca4779eb9e75d03fdd66871c4ac639b3b137462900e6ed17d

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