Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb69a2566a07a5d…

MALICIOUS

PDF

73.8 KB Created: 2021-09-18 00:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f71c55f91249e7fe4780c3572da9ab7c SHA-1: a28316a05d2d0f739a76b8a87db4f359355a1020 SHA-256: 5eb69a2566a07a5dd281a9d622b6b3867cef35619550fc0d7ef3095dcc1623d3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The presence of multiple links on disposable or compromised hosting indicates an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbc2c211c0---rexopiledujuvijoti.pdf In PDF document text
    • http://exito-opakowania.pl/userfiles/file/48842969629.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/186e4c4ac7e0d926bef4ebc6d98e8583/kujivateme.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613143dc1ff7c---40219811031.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/22957507801.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/paxunaxinimatozirak.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/15406906395.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/e52830dfef1aa2f758fd63001685075f/jubugukuzezen.pdfIn PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/75613713981.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161387db386fe8---jivomilobudaxedes.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/75852140436.pdfIn PDF document text
    • https://perfectsextherapy.com/public_html/userfiles/file/vezapifut.pdfIn PDF document text
    • https://hotelangela.hu/userfiles/file/76209091217.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/12811333472.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/file/ruvepebo.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/56214380821.pdfIn PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/nuribulexegepumoteki.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/95710a88ba729a1a4ccd777437ac3273/85442562042.pdfIn PDF document text
    • https://vonia.mikludava.lt/images/files/65118230671.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/48280202347.pdfIn PDF document text
    • https://foulardfotografando.it/file/31933126897.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/semekasan.pdfIn PDF document text
    • http://savalis.ru/userfiles/file/rasurizasapoxekatewa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=convert+rich+text+document+to+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD3E 16924 bytes
SHA-256: 908b9a33617fc20343ce4e6909f55106103cfbbb93d8ff47a840ffaeadb8abaf
font_01_sfnt_off0000e8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000100b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B7 10808 bytes
SHA-256: 90d8a4e6d37aa6cfcbd910c1a8fb431381bd9e8d00c89b4260189949476585a1

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