Malicious PDF — malware analysis report

Static analysis result for SHA-256 471ef06ee7142eed…

MALICIOUS

PDF

87.4 KB Created: 2021-07-24 00:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 5841ca454892310a93bbe5cd0fd51b18 SHA-1: 9da5024264ee3b4a850cf0fb2d3756c60b58ccb8 SHA-256: 471ef06ee7142eeddb0a814de1faf4d113ef0110f50c002eb163fb882aa77201
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised WordPress uploads and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. The presence of multiple PDF link farm heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://losmarinoslanzarote.com/marinarubicon/admin/file/fuwowipog.pdf In PDF document text
    • http://omgmediatank.com/userfiles/files/37897991242.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/12509864940.pdfIn PDF document text
    • http://tremonttemplemacon.com/clients/862779/File/nemanimewejutama.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2c58baaaaa---65225890364.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/9t7pqlcgttp427e7i809sht637/74132149335.pdfIn PDF document text
    • http://euro-ex.com/movijub.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce0fbb1dc1---pawamum.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/ditamebifitefo.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/14394191297.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/59038129.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/55911846812.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/kuraripoderugozajubir.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/5vr7jmo778953q3od4jpiv4ier/89515481984.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/960ff75ce3d76869d3788e2264859239/sotujibakirabunalov.pdfIn PDF document text
    • http://studioego.cz/userfiles/file/benumomugilusakanipuzi.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49e51bea22---fawirusolozabigojusozut.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/0082ec71c4d51ebdcf18e4f5e66b3ade/84596147899.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/goferaxi.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/f234d472617acdbe36b012b525c423fe/7120514545.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/45082827308.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/jixojalonumifate.pdfIn PDF document text
    • http://dooroc.com/tk/upload/file/kesediraripoz.pdfIn PDF document text
    • http://componentcnc.hu/uploads/ckfinder/userfiles/files/niromes.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/muworikajizumamo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=me+and+the+key+2+level+19PDF 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_off0000f165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF165 17552 bytes
SHA-256: 699b133a3b1ba70c6737f5fcc48965d25d98437fdaa825ec2323f16c2fbcbe63
font_01_sfnt_off00011fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB2 10472 bytes
SHA-256: 9cb0bffcf996eb153b923228b39e9e84f1c4ea91a7b036ab8db07d6a68b16b69
font_02_sfnt_off00013789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13789 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1