Malicious PDF — malware analysis report

Static analysis result for SHA-256 2868bcec3b71883e…

MALICIOUS

PDF

73.5 KB Created: 2021-09-08 04:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a1f089f629ea968e8acde827170047c4 SHA-1: 6254dd7e2bca93f0f02e9dce0e250a1d6b4af5af SHA-256: 2868bcec3b71883ed88703febf6d2e4300009800ebbd82c41cdbd4a05f4a919c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to various websites, some of which are hosted on compromised or disposable domains, under the guise of a PDF to Word conversion tool. The presence of numerous external URIs and link farms suggests a phishing or credential harvesting operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/16335987159.pdf In PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/8697565765.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079aa0cbda7c---gidimugenija.pdfIn PDF document text
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/70946212831.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/n4he7cne5uqdf26f09veh94bjt/nozajurobajuvenepapune.pdfIn PDF document text
    • http://rwdwebwebdesign.com/img-aim/files/43805543578.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/vexirel.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160a2129768331---66583228735.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/lajevafesawarifozubagu.pdfIn PDF document text
    • https://stomatoloska-ordinacija-rijeka.com/files/gatokabuzadimegexixaturu.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/236eb371348c8b796a4322fcd50204c2/tibidalinibofuwegeli.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/9e1a481ae61e1098da547aa8009705ed/duluweku.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/757f0f7d3e8fcd3be67fb84d017ca816/38661897776.pdfIn PDF document text
    • http://guoyangmoju.com/userfiles/files/65157903599.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085afba1a1c1---58577873577.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/c7f72b068288572d63be5fb87059dd2a/moxokovaxatebafunodul.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16099f1c9b5fb6---20799430474.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b73c1c2017---febesuwixi.pdfIn PDF document text
    • http://marchmontnews.com/imgs/file/vironuxupawigijegifu.pdfIn PDF document text
    • http://zjlytl.com/images/upload/File/25380277453.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/bemawilobexapawumesalanof.pdfIn PDF document text
    • http://exdebt.bg/userfiles/file/xojoresufaxapelidu.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/61662745780.pdfIn PDF document text
    • https://artbynela.com/uploads/file/63614927914.pdfIn PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/98143094896.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=convert+pdf+to+word+with+tablesPDF 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_off0000bd91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A8 10916 bytes
SHA-256: 928a5117ba94b62e13c56c62eede6fdc5978b01d1862df217608086a003b9ff1
font_02_sfnt_off0000eeb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB6 16016 bytes
SHA-256: 47d917f828ae98ad3c0538bbc030d3ea5290df8da8ac33f56dae6056186f3d3c

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