Malicious PDF — malware analysis report

Static analysis result for SHA-256 be420ba89e9bb986…

MALICIOUS

PDF

89.2 KB Created: 2021-09-21 09:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5a751edd290e25d5a07a0e4fc8abea0d SHA-1: 8f2a1be4a5e78f107a58f9bf33af2a1f5c9b3dcd SHA-256: be420ba89e9bb98646948dab9570183b1c0bc2579e5db8f483ff816793d755d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the heuristic firings related to link farms and compromised CMS uploads suggest the document's primary purpose is to redirect users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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=asphalt+nitro+old+version PDF link annotation
    • http://rajhansnursery.com/userfiles/file/vosojaritede.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613583684d286---16605836990.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/42048449572.pdfIn PDF document text
    • http://ryouhurt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18552167934.pdfIn PDF document text
    • https://badoza.net/userfiles/file/pafilowotilojibapovujo.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/59047949208.pdfIn PDF document text
    • http://detskypohar.cz/upload/file/20471455128.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145026a2e83d---24555257514.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/83060658738.pdfIn PDF document text
    • http://triple-a.co.th/ckfinder/userfiles/files/38002351461.pdfIn PDF document text
    • http://pedraferro.com/files/files/11046149376.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/kigitilikedoresus.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/ce45d887997360d79a23cc58ca525086/sovotowobubotajaroto.pdfIn PDF document text
    • http://warmistore.com/userfiles/file/nutelapikulag.pdfIn PDF document text
    • http://vstarmp.cn/upload/files/20210903_095310.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/pujiwibubuso.pdfIn PDF document text
    • http://hpcad.pl/Upload/file/45882559889.pdfIn PDF document text
    • http://businessdevelopmentcenter.pl/uploads/userfiles/files/79240914226.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/vixepozop.pdfIn PDF document text
    • http://www.bash.cl/media/file/47232647148.pdfIn PDF document text
    • https://implantologie-deva.ro/app/webroot/files/userfiles/files/ludisapekidabegogazag.pdfIn PDF document text
    • http://debeight.net/UserFiles/File/takawig.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/tpcuqcas8aip0h1g0fn2rfh4b0/rofikigiremafesilidebe.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/kebotewotijozojamaz.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/78022389818.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/56248739652.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/nejutof.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/161326550e5f02---89686922476.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_off0000f889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF889 17648 bytes
SHA-256: 3618e275fe0e0552240dbd574a4683dc657dc4795cec57065e8c75eabfb471ff
font_01_sfnt_off0001268c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1268C 10536 bytes
SHA-256: 16abcae4733210cd690a44c719912064e6bc35628ef481e672dbc067c6256658
font_02_sfnt_off00013e95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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