Malicious PDF — malware analysis report

Static analysis result for SHA-256 98c02389afde1924…

MALICIOUS

PDF

85.9 KB Created: 2021-07-18 17:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5c25ace424b4bbbd32724340c627d512 SHA-1: 3a7a84aedcff47312295655860c7b0dc175ccedc SHA-256: 98c02389afde192420f110ca7d2cf390ca55ad7c9d6fe8b65e0d129559a22713
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to manipulate search engine results or direct users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://rachelrom.com/rescontent/file/74550785151.pdf In PDF document text
    • http://wildpflanzen-planung.de/file/genidaj.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ec5a5e69e---titivet.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a53fbdf30b4---wonajuxoxavar.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/japivoludobezukuzufov.pdfIn PDF document text
    • http://danfilenemd.com/clients/67744/File/60057265331.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/24075315490.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/dudafujonujolufaruv.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609fea125c028---73775332798.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160be06c27b662---84583240412.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/62830538713.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/7261238147.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/68613809599.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab97155c63---607761051.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f7934abea---xulimogamuni.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcbc39bbce---44712099263.pdfIn PDF document text
    • https://kis-u.com/page_data/file/20210605095241.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13386448198.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/91137732012.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/11620519305.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b8135e27b0c---ruxad.pdfIn PDF document text
    • https://securitydm.com/slicice/file/junigi.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/04b532237226945687e369480a33e777/87277113937.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/3571857107.pdfIn PDF document text
    • http://simonide.org/userfiles/file/19043215354.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/4667bca75b9f8191019f5f2d04f08393/sapor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=kingdom+hearts+2+cavern+of+remembrance+walkthroughPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE903 17528 bytes
SHA-256: 3dbeee15e893625ed09de9064d41d4359dd3777f9720932796f08ddf1ac9cb0b
font_01_sfnt_off00011679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11679 11520 bytes
SHA-256: c97c7ea3a8a4aef26ee4e881a0832465c26113f5fee79d3f47f3dfbff41d395d
font_02_sfnt_off00013178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13178 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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