Malicious PDF — malware analysis report

Static analysis result for SHA-256 00463a1d69d337e7…

MALICIOUS

PDF

74.7 KB Created: 2021-09-07 16:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 19b9414a9e5203a0042bd85ee276bc0d SHA-1: 0d6dc70c38e218e19dbd2e62c5b3f72abb04f444 SHA-256: 00463a1d69d337e70ffb7489303ea6c6f77d5608281bfd35db747e370085d532
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it likely serves as a phishing or malware distribution vector. The document contains a link farm pointing to multiple unknown domains, some of which are hosted on compromised CMS uploads, suggesting an attempt to obscure the true malicious destination. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it may leverage embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://grupahatak.pl/admin/_fck_files/file/jixexukexi.pdf In PDF document text
    • http://creatinglifeoptions.com/userfiles/files/75811497472.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/zovosakujanaresonoxidi.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/97812808903.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/ponolugepewovej.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ee87a5f43---fujexakazosafe.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/52685678507.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/89f7f1e8dd53e6101598d394ef6d5f2c/98694307559.pdfIn PDF document text
    • http://wijnhuis-vaessen.nl/site/data/ws/files/94351554646.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/lagidokitopodara.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/winok.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/c719n84bjtbmp1s1t484q8vgu6/werikogegonajela.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160af97f24be80---mujobujibareletaxeme.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/bikavemaforejewubizore.pdfIn PDF document text
    • http://thegioichuyendong.info/app/webroot/upload/files/vagipiwelejamiwe.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867b9f15633---pamumununefiz.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/17b27c3811a80fd653a225b09c6e8885/jukajisikuzil.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b0532dc8fef---3319173865.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/bavufejetajuligejipowatir.pdfIn PDF document text
    • http://poultech.net/d/files/zeximazejezelur.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/141107234441.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/kobujewekarutuva.pdfIn PDF document text
    • https://035620126.tw/upload/greenkitchen/files/ketixorewujijizexizepo.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/kapawusikeno.pdfIn PDF document text
    • http://nensi.si/upload/file/nobijatirewukupunivabif.pdfIn PDF document text
    • http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/rozov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=convert+pdf+to+word+using+adobe+reader+xiPDF 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_off0000c055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC055 16552 bytes
SHA-256: e44d3b82556232d8d87ef1edd92314e19b9ffc75d72ef6d45e6549cf11eea2ea
font_01_sfnt_off0000eb2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2F 11152 bytes
SHA-256: f52682d7e67381a65ac5ebb4e60cb4688d10405238c50f72bca7b9951538b21a
font_02_sfnt_off00010518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10518 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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