Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d68472972b84a8e…

MALICIOUS

PDF

76.4 KB Created: 2021-09-06 02:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 69d75385ca758f903e405b768d3438ac SHA-1: ad7f8d1eba54d8c1c52eaa436991c1da35e7340e SHA-256: 5d68472972b84a8e1d39085167410d683e9e71f205340beaecd82e7ca05c3dde
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites, likely serving as a distribution point for phishing or malware. The presence of external URIs and link farm heuristics strongly suggests this document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://medvor.ru/uplcv?utm_term=cebada+propiedades+medicinales+pdf PDF link annotation
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb857c01d0---34773596429.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/fc851ae2122a55c684d5820dd4e88c4b/50781912274.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1d54a1ed1---xogim.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/3f1686c58eca407d8902253f0fa88c01/35117820068.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd4c68b9d2---lodaxoraxisuwav.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/66879509153.pdfIn PDF document text
    • https://h1t-urlaurora1-turbo.com/contents//files/rizokigifepibifezosima.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/zolomar.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210611215247.pdfIn PDF document text
    • http://englishkan.net/UserFiles/File/kimedibiw.pdfIn PDF document text
    • http://uitetenindex.nl/images/uploads/77603910268.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8a3a9c483---5208399333.pdfIn PDF document text
    • http://cjatkinson.com/userimages/52631262365.pdfIn PDF document text
    • http://famillespourstarlight.com/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/36938686186.pdfIn PDF document text
    • http://clainvest.pl/userfiles/file/xuduwapuku.pdfIn PDF document text
    • http://uci.ir/userfiles/file/dorefovasefisileg.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/n1sqb4faeokt1alsm14ck152hh/patewezukugutedemobop.pdfIn PDF document text
    • http://owv-sad.de/userfiles/files/53678125708.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb6090d191---gasuwo.pdfIn PDF document text
    • https://twfern.org/upload/ckfinder_temp/files/20210620102937.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/bd99b40eaaf877c0d4e47e0f10c34fcb/vidaxaral.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f3f18e731---pelaxorinimo.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/gujurifamajepilarazopa.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/37597522634.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_off0000c8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DC 10852 bytes
SHA-256: 28202c85a38bad12ac78900c0d3b62f8ce9d4c080d90e5d530cf7556645fbb7e
font_02_sfnt_off0000f9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A0 17060 bytes
SHA-256: f1369b25db7f5b907921e8d12a7e95f0e968af2c7073d6fa0915abb9f5343fd0

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