Malicious PDF — malware analysis report

Static analysis result for SHA-256 833c56fca87a2d90…

MALICIOUS

PDF

72.9 KB Created: 2021-04-01 07:22:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 895547b6b55374d9f239968aed4333cc SHA-1: 0438dac517b0d3e2069c90065f03cf6eca7a158e SHA-256: 833c56fca87a2d905a6a58b582db50a09c191b2d36a9f6a9607e380ca32527a9
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of external URIs suggests the document is designed to redirect users to malicious content, likely for credential harvesting or further malware deployment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/123?utm_term=simile+and+metaphor+worksheets+k12 PDF link annotation
    • https://runufegoxow.weebly.com/uploads/1/3/5/3/135347372/xetava_tolipufoza.pdfIn PDF document text
    • https://tuwoganerolet.weebly.com/uploads/1/3/4/6/134631505/wuvetolam.pdfIn PDF document text
    • http://worldworkbook.com/zugonigejuvodeamadv.pdfIn PDF document text
    • https://kovipokuvukos.weebly.com/uploads/1/3/4/4/134497495/bulezirekawafon.pdfIn PDF document text
    • https://tujilebofali.weebly.com/uploads/1/3/5/3/135398949/1d55daa6efac.pdfIn PDF document text
    • https://sijetuso.weebly.com/uploads/1/3/4/4/134499475/liwazumavefobe-gasamunimadigef-wiromadoduxo-xovosis.pdfIn PDF document text
    • https://gabonavokelog.weebly.com/uploads/1/3/4/6/134684269/gunediragazawog.pdfIn PDF document text
    • https://fudegedetet.weebly.com/uploads/1/3/4/7/134733785/kexadapopugugarok.pdfIn PDF document text
    • http://sks-expertiza.ru/40152950233zdqmq.pdfIn PDF document text
    • http://dietnatur.fun/80742734782apa71.pdfIn PDF document text
    • http://mainsale.pro/craigslist_nj_apartments_east_oranget9gvc.pdfIn PDF document text
    • http://mon-cmbretagne.best/xitenifutaxevivataiku6x.pdfIn PDF document text
    • http://kedepoba.sportsontheweb.net/air_force_lor_rebuttal_example.pdfIn PDF document text
    • http://fekosuse.getenjoyment.net/fiwimitimumi.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/wewiro/4th_grade_grammar_ideas.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/powerpoint_2016_custom_template_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f207269-62d3-41d6-94b7-8c5efcd63403/90488013292.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/92523201492.pdfIn PDF document text
    • http://jokubamobivavum.onlinewebshop.net/illustrated_encyclopedia_of_animal_life.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/9171855292.pdfIn PDF document text
    • http://pusebirenox.myartsonline.com/pububonuluro.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/jumefixitawegarowifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e0d893-1aac-4f5a-80f3-d941f05e7c34/41684346781.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_off0000dec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC0 5644 bytes
SHA-256: 3cfa8dc02008b0960dd4d2b9284dea532bcf081dd62f294a28c11598e22c7f66
font_01_sfnt_off0000f1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D5 10552 bytes
SHA-256: 6673cdc96d1bcb8bb7760ead0550f5f82049cb38863fddb3fce59a1cf6cd6a08

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