Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6719ba7dd7d3b4…

MALICIOUS

PDF

80.7 KB Created: 2021-09-01 05:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9cd342859baa07bb01af63509441291e SHA-1: b4f7baf77001657be07095ba9e830e87f7b17635 SHA-256: 6d6719ba7dd7d3b4c0361785561bdfb9457cac576818c584ea54323fa392cb5a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories, likely serving as a distribution point for further malicious content. The presence of multiple external URIs and the 'link farm' heuristic strongly suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d68c23b797---31628412357.pdf In PDF document text
    • http://pettwayfamilyreunion.com/clients/39389/File/8475725845.pdfIn PDF document text
    • http://shangrilayunnan.com/ckfinder/userfiles/files/vetonunimoxoketugifi.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/aad366749a431708f73cbf9ad048f108/sadububotedanexojivele.pdfIn PDF document text
    • https://raovat72.vn/uploads/news_file/89464302659.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/96774421969.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/d07d6d62ce150e4115af737a9d2fb672/fevim.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/weturezugugetutuzadebama.pdfIn PDF document text
    • http://cokhitienvuong.com/uploads/files/maditegidanu.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/f1164319a20001a8467f632c5b7ab267/winakuxidetunona.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/61aa96ed0a826feb67f3faa86703dc1b/rekonirosivopu.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/97f008dffc33cfadfc2f0c39b96785de/43405995719.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210702195207.pdfIn PDF document text
    • http://yonezawanet.jp/units/24250/zcycom/files/74082370129.pdfIn PDF document text
    • http://bakerfamreunion.com/clients/1/13/13be4b03bdabdd3a133c3ee64ed6201b/File/46767547260.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/jaxibameku.pdfIn PDF document text
    • http://2990592.ru/ckfinder/userfiles/files/10650552136.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/moziwibalap.pdfIn PDF document text
    • http://eastbrunswickliving.com/clients/77672/File/lunogurujafop.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/7ad98d5f2df14f1bc6030de0a51914e0/87081129397.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/13ba29e1b8b31254a69e1671f60cad26/75419013232.pdfIn PDF document text
    • http://opt-russtd.ru/data_center/upload_pictures/file/pivogi.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/e7fde4ccff6321a93938a91827a3a664/xemer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=out+of+townPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B3 9716 bytes
SHA-256: b4499c3aa60d301716aea3f9494d2fd2b73339139e5086f79874b031bb6e91c2
font_01_sfnt_off0000dd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD12 1868 bytes
SHA-256: 9d2bb2d94384256bb38bab4c3005c13f44a8b25eb5b232dcefe64ad24aae4b51
font_02_sfnt_off0000e5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0000fddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDB 21012 bytes
SHA-256: 0aa4538f7c69500229470271c3748cdde2326000fb87eb80faf629f1eefe5b49

Open this report in the interactive analyzer, or submit your own file for analysis.