Malicious PDF — malware analysis report

Static analysis result for SHA-256 567508ab07e3ef97…

MALICIOUS

PDF

83.8 KB Created: 2021-04-04 21:40:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 91570416d5a610f16717ee7dfc4780c4 SHA-1: ecc0c376160e6d3e0a5c1c7886d9d39190fa6ac3 SHA-256: 567508ab07e3ef97867f34b15f8b8e2c92d1fdcdaaecd2fd6e6bd52a292331d5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://soxebez.ru/award?keyword=equinox+brickell+heights+class+schedule+pdf PDF link annotation
    • http://pexulabin.iblogger.org/ginedojo.pdfIn PDF document text
    • http://mosoxiliraf.iblogger.org/endemic_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/gibewuzavi/rhgGih8/57986827319.pdfIn PDF document text
    • http://winclean-shop.space/mupomovuxenifil23vl.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/national_paint_product_data_sheetcj0l2.pdfIn PDF document text
    • http://momentikshop.space/jupiter_merlin_income_factsheethof4q.pdfIn PDF document text
    • http://idealslimitalia-official.site/xojotefejaoev6w.pdfIn PDF document text
    • https://nevedaroxizewav.weebly.com/uploads/1/3/4/5/134592578/wisamujafezan-sarolomadamesus.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzojivemepe/igTQjh1/rajma_chawal_2018_movie.pdfIn PDF document text
    • http://sagaxafemet.22web.org/balazevutegizimolefoxulo.pdfIn PDF document text
    • http://dobataxip.iblogger.org/national_agricultural_technology_project.pdfIn PDF document text
    • http://talinab.iblogger.org/biwafug.pdfIn PDF document text
    • https://zifusiwi.weebly.com/uploads/1/3/4/6/134686012/2128533.pdfIn PDF document text
    • https://rilolani.weebly.com/uploads/1/3/4/4/134459611/bejepawobiteven-nexawujem-jiwexowumavox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://niginikixino.epizy.com/pugolometenilodefitawul.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/weather_report_in_london_now.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/zofiguferinuxonulidu.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/2844152223.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/public_administration_meaning_in_malayalam.pdfIn PDF document text
    • http://sobumewupuvuve.epizy.com/gamagobilaxex.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5B 5772 bytes
SHA-256: 9b7285d1812cb1d8fca1ddc5794be10d0a05ce192d5f30b87e7062213d469b7f
font_01_sfnt_off000100ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FF 12928 bytes
SHA-256: 1268942f2b68dabd3212e3ee9c3c138654e0d4f2792dccf1f6b932d655838826
font_02_sfnt_off00012c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C08 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660

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