Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ed05ca15cb64426…

MALICIOUS

PDF

89.3 KB Created: 2021-07-02 21:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 929c5a94e91b1240731ccb9406b11ff1 SHA-1: 28fb11dd1f55b0f73cb0b2eeb6b58f7c6ee27c61 SHA-256: 8ed05ca15cb64426107c52c806e89f33a4cfd9d8b29f6209fdb037df48ed3784
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a link farm with numerous external URLs, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and URL distribution suggest it's part of a phishing campaign designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://barudan.hk/UploadFile/file/20210526103742227.pdf In PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/a506qitn92ntlomb93e5a62kg1/67735767907.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/romogoxopuzukinesutona.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16211016330331.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/96bab4d077e838fae89b90618dc5191c/44124396275.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2723d33d5---15056501246.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609878656c6da---rebekusebopemafalubub.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd6035b262---49345849752.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d6dea323de5e69ecd4220797393dbbd7/dibugego.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/92319248651.pdfIn PDF document text
    • http://cuahuyhoang.com/media/ftp/file/sovapomu.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/97794024288.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/nibeforuvefomagajosip.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb16b68273---mimanipunutunasifojofu.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/tizutiviwo.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/661ab3badcbf9147bd963fe41fde468f/57656644231.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/66739007727.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852c2c1e202---siwuborosokoxuvuxodid.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aaa115f7c8---jelemijewoju.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160801e4be0d32---71557220690.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/c5n38b2hbo821p9uppnjbdlcpd/bizanidekunamafoguf.pdfIn PDF document text
    • https://htchninc.com/d/files/wevolizapujibural.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/c5e8204092ddf4933c2504709bd8979b/xawuwajemap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=wow+in+vr+2020PDF 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_off0000f926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF926 9880 bytes
SHA-256: ab1c21168657afa1252b5e0d02e66e6e6352118a67a6d6b28dbbd5bd3a64ea65
font_01_sfnt_off00010eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFF 18932 bytes
SHA-256: 7772040aafde5663bfaef37bf33d0f465fb4e7c1ad4acceda3fec899b3423d93
font_02_sfnt_off0001405f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1405F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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