Malicious PDF — malware analysis report

Static analysis result for SHA-256 65325e7fed98f17d…

MALICIOUS

PDF

83.1 KB Created: 2021-09-04 14:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 236ff14dfa4b51de7805c42e222bb841 SHA-1: bcc7b782037730af8f656f465194aa6941de62b3 SHA-256: 65325e7fed98f17d7591ad8b3967c86a3b760a7c8bb183a03a8bb9aecd282e33
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for delivering malicious payloads or redirecting users to phishing sites. Several heuristics indicate the PDF is part of a link farm hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/3b93c5728347043728c93ae3edd33072/buvedezeteselenawawetu.pdf In PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca02e92fe3a---mositaxivilesiwab.pdfIn PDF document text
    • http://kubabus.cz/novy-web/upload/file/93690543009.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b685cc9ff7---niforivadawaweriba.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/16984682513.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/24598043161.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa09f265620---85567491722.pdfIn PDF document text
    • http://gzafjc.com/uploadfile/files/zaxirikabibaxizolep.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161219109715d8---simeximefefum.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/umsiv1afi85d12d45uo6hp2oco/zanorerumapiran.pdfIn PDF document text
    • https://phr4u.com/files/mititekipidinokadinikure.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/d8fc1e3dee1ddeaf6915ab5ade49fc1c/vonowibakefuw.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/bukesumekugaroza.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/89b6f90c96eaccca3039f45325ced88d/76219261966.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/76383597741.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/86908865359.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/remozegividigadobojadi.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/87614362115.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3fd17b21c8---35979614304.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/62091125964.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/rakelakig.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/rutipepudegaxaxisago.pdfIn PDF document text
    • http://atek-ent.com/upload/file/29215632660.pdfIn PDF document text
    • http://rama-sp.com/rama/webroot/js/ckfinder/userfiles/files/43870634029.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=honda+civic+2013+manual+fuel+average+pakistanPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/95474660745.pdfIn 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://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_off0000dbf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF9 11676 bytes
SHA-256: 99ebc58c4b5a279e64d4e67cde57f15ed44d6c83a908488573799e31b27bc893
font_01_sfnt_off0000f7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AC 17888 bytes
SHA-256: 4bb209df84951b38a95b7a83b79a364c5a17cae1032e9828a2decd664dd3d7a3
font_02_sfnt_off00012610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12610 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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