Malicious PDF — malware analysis report

Static analysis result for SHA-256 746aab47ea41dbb6…

MALICIOUS

PDF

86.8 KB Created: 2021-06-13 19:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: dbd6648d45639ff5189bbab4d1b0664e SHA-1: 217de4892370c67b49421e7878ff9e805641def7 SHA-256: 746aab47ea41dbb610a38cfa28514744847b0c6e3246f755ea4f6fa9723a9d8e
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm or phishing campaign. The presence of the 'dude theft wars android 1' string in the document body, combined with the ML classifier and ClamAV detection, strongly indicates malicious intent. The file likely serves as a lure to redirect users to malicious content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 https://laborke.ru/uplcv?utm_term=dude+theft+wars+android+1 PDF link annotation
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/cfjno1i69ig8cmk7d0j6fjt4ht/7555845566.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/c74df358258e07629143f28b63a64c3c/taxusiduxujejipip.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071db3e1000e---pesotif.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/19167906412.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af91f533a96---58148705377.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/95427297776.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/b45801dcf136f6c6e0eb3b66403d7929/dasabaxunosogowibajefuzen.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/9559896045.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/safulema.pdfIn PDF document text
    • http://burchiellati.com./file_fck/file/gizoma.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608738c3d58e9---88300798527.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c43cfb6fa02---mebuwek.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/10125977695.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f28a448fc---dolesapu.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/82524190841.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/wajegopidimuniriwemipur.pdfIn PDF document text
    • http://splogservice.ru/content/file/jeseduviravetinevebukari.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087da65d05e1---43295481368.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn 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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED67 5108 bytes
SHA-256: 4fb0fb5307121fa2e462e2c3c7ab4e16118b3fefe0fda2905a71ab9b1b78f392
font_01_sfnt_off0000fed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED7 5756 bytes
SHA-256: 6122aa50f76dbb4884d712b74bee156a93bf868ada25df812280d52842dd06da
font_02_sfnt_off00010d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D43 13464 bytes
SHA-256: 048d9399acd62f920121a76300cda061f48318b42d440900a792bf7f08a72709
font_03_sfnt_off00013701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13701 16160 bytes
SHA-256: ab862ddcc36e5f8abbcc0ec12f45ee2a0a0017beba85073a80867d3ee452b16b

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