Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46e69344c1134ef…

MALICIOUS

PDF

71.5 KB Created: 2021-09-15 20:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 37f1052b3ce74c9e9feccb9ed3c515f7 SHA-1: f8b9c9aa4800a6d491b0d3936f1078ffb623ca9d SHA-256: e46e69344c1134ef54938a28fea70389c6382b9c0b14a787189509a5e19d2eb9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with numerous distinct hosts, suggesting an attempt to distribute malware or phish for credentials. The presence of embedded URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support this conclusion, pointing towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/25426910587.pdf In PDF document text
    • https://alcoquimicos.com/ckfinder/userfiles/files/dinirinuxal.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/52016228503.pdfIn PDF document text
    • http://www.aragonemprendedor.com/userfiles/files/94034696834.pdfIn PDF document text
    • http://eiffelflowersquesnel.com/userfiles/file/bugusarixewekepifatob.pdfIn PDF document text
    • http://chengzechem.com/upload/files/51614558622.pdfIn PDF document text
    • http://www.nagsa.es/ckfinder/userfiles/files/netudilimuditipinimurixe.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/190279886061341e98d1bd8.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/20589750042.pdfIn PDF document text
    • https://deitratech.com/userfiles/file/92875448693.pdfIn PDF document text
    • http://resurrection-life.net/userfiles/files/85597340103.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210901232120_859867231.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb990614a5---34837673846.pdfIn PDF document text
    • https://citrasas.com/ckfinder/userfiles/files/98915962512.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/popokuxepopepidaperadubaz.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/viziranomezivijatigudut.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021090303321527104.pdfIn PDF document text
    • https://flomogroup.com/upload/files/87460194958.pdfIn PDF document text
    • https://ahirealty.in/admin/userfiles/files/xirenufejiziwikugokavonu.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613079b2aedbc---nemuxivabum.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/motosumonuti.pdfIn PDF document text
    • http://hongsung114.com/files/fckeditor/file/tugoxukuduz.pdfIn PDF document text
    • https://wedding-photos.cz/userfiles/file/1127471117.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/fiwevixis.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/09/files/210915224128.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=cross+court+tennis+2+apk+full+unlockedPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB465 15896 bytes
SHA-256: 4c73333764b008ddbd5535b148976a273ec90e591723e42f920e1e09017e616a
font_01_sfnt_off0000dcf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF508 10956 bytes
SHA-256: 2b6e60d6558ae11a702f8291c3d01fd25696f209844b91191d5584e0d21b29ea