Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae29ec91ab97fc82…

MALICIOUS

PDF

82.0 KB Created: 2021-09-19 07:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3c685f8960bb0b4f567e61dc637118c3 SHA-1: d580ebc71e8f86cc40d1f6b1cb4538dc9717a822 SHA-256: ae29ec91ab97fc8239190b70f32fde2351454ba16af747eb932bff23ebf6ec39
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. Although no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest it is designed to lead users to phishing or malware hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/161301b31eb7ee---wopazojemejil.pdf In PDF document text
    • https://bimstudioinc.com/media/files/47476209069.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613638c7bc3df---16669759435.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/14449087897.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-9-3/20210903105517621342.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/56246790199.pdfIn PDF document text
    • http://evrokomplekt.ru/userfiles/file/menutebikerudizamamuv.pdfIn PDF document text
    • http://gardensyellowcab.com/admin/images/file/godazanodenuzedesikid.pdfIn PDF document text
    • http://dienlanhlongan.com/upload/files/8228327942.pdfIn PDF document text
    • http://ketoanantamhcm.com/uploads/files/liwuxowu.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/2f382762290fc9f1211a94fbdd0497b9/xatekawulixexafat.pdfIn PDF document text
    • https://hung168.tw/UserFiles/files/sifal.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/soxadorugit.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16145ad4b8b638---49404875612.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/785666225.pdfIn PDF document text
    • http://czminghe.com/upload/files/26030789317.pdfIn PDF document text
    • http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/penoluxijakoxeguxixoxi.pdfIn PDF document text
    • http://valencia.thepokeluau.com/uploads/files/navapososaloxewaj.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/32819249922.pdfIn PDF document text
    • http://novo-foto.ru/ckfinder/userfiles/files/wazoda.pdfIn PDF document text
    • http://metallpress.info/files/67029117678.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/75334684645.pdfIn PDF document text
    • http://adice-area.com/pictures/files/91226517170.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/pikagexodelanifolizu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=king+and+queen+of+england+listPDF 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_off0000deb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB5 16976 bytes
SHA-256: 02e0ce9071b9c01a905b1b8b091d95d20b2af00e1eb6007f76e96c6aae2ac189
font_01_sfnt_off00010a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5F 10668 bytes
SHA-256: 4ae23e4c5662c9a687ffbfdfe061b78eac2bc81aa048e74a922e75c015888d25
font_02_sfnt_off00012271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12271 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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