Malicious PDF — malware analysis report

Static analysis result for SHA-256 148a2d659813226a…

MALICIOUS

PDF

82.3 KB Created: 2021-09-10 04:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 1924bd51d847ca71e94df3c4f24bbbc7 SHA-1: 216320db2238ac534ca24fd8503401027892a777 SHA-256: 148a2d659813226ac5e908242fd05e83ec019c6d3262bda0819d353711c88c24
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9970

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 http://pytextiles.com/userfiles/file/88445490954.pdf In PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/lv8tmkqoq1pvkbr3huqplpb4hn/rukeguzomisalekajipixu.pdfIn PDF document text
    • https://marcuspietrek.de/MARCUS/files/file/98639922221.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/konomoronepoxadakedekono.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613112fa871a7---pugulu.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210901110725.pdfIn PDF document text
    • http://www.bandungmesin.com/file/salediniz.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/70601640755.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/94187500673.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/xoragosetif.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/73634670907.pdfIn PDF document text
    • http://ecohouse-lab.de/userfiles/file/71627810227.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/nuwigexufo.pdfIn PDF document text
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/gubudovipi.pdfIn PDF document text
    • http://stnicholasway.com/userfiles/file/saripodowupononezanulix.pdfIn PDF document text
    • https://jocafoto.com/fotos/file/34855448930.pdfIn PDF document text
    • http://muaah.ca/userfiles/files/64959054772.pdfIn PDF document text
    • https://buka.ru/sadm_files/vozowopinawevizivoju.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/wusaluvovaf.pdfIn PDF document text
    • http://shophouse.info/images/files/2491842809.pdfIn PDF document text
    • http://knipia.com/userfiles/file/34627672279.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=arrival+ted+chiang+pdfPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6A 10656 bytes
SHA-256: d6c753dc94fc2b3fda5e90736136a1e1931e16baf8b353fb5bd259f47b6cf96c
font_01_sfnt_off0000f68a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68A 17580 bytes
SHA-256: c68e90a309e1f5d654d8bb0480af5692bb879db381e561de9fc03671f52716e8
font_02_sfnt_off00012446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12446 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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