Malicious PDF — malware analysis report

Static analysis result for SHA-256 745f4cf5bece467d…

MALICIOUS

PDF

82.4 KB Created: 2021-06-27 09:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 5c1998dceafe1ff78e00c01e60fe5551 SHA-1: 87392fe0072af1b7176b4d46b36df9d9e543f0a4 SHA-256: 745f4cf5bece467dd2b8780b1b829649c6c2caa64c6d9f23bbbf7d66107010a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains numerous links pointing to potentially compromised WordPress sites, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the links indicate an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://huntic.ru/uplcv?utm_term=home+alone+2+watch+online+in+english PDF link annotation
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/4kiqg3isbndc3rlk4050r67nq7/dubupejur.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/1254010764.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160cb11ba3fd65---lafulipulemidadigawumazox.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf9e22369d---zulopono.pdfIn PDF document text
    • http://edison76.com/clients/5/54/54c13950cbd15a81e6fb4362eab8f273/File/68387761781.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d9d47751a---xiduraguga.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///70785942658.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/8e40a33552cb106e4eda8ed81f675a87/52157079684.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/d397d2d4079edfe58307c3f2ad243f7b/sogifolikibuvepirumofe.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca57756b3e---59673716027.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/36305796869.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609086202e7b6---regegobenulo.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a36a9db13---22838396796.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/32e53e1eb0dd84c241f144f50cc11d10/61762649950.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/42218470971.pdfIn PDF document text
    • http://ketoanantamhcm.com/uploads/files/pivilatepoz.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607de8246781c---wojajiferajewabenedug.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/suwipedokofemif.pdfIn PDF document text
    • https://nffcd.org/userfiles/files/lemunuvevuxivujenamupi.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/45440371759.pdfIn PDF document text
    • https://tl-systems.hu/files/files/rubiwulavovir.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ef07a41c8---telenosobitinixusaguxikaz.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/b3e51c8e09d8979f5bdc3181498d34de/luzuwekizim.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/rimuqomsg4pvgos3fvbp0e8i91/42215502039.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_off0000dbe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FA 10772 bytes
SHA-256: 5e2f8b3c22982d3885cc0d6cb5f5b7bea53980dde1f4611cc5a828b9e853f03d
font_02_sfnt_off00010ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA1 17716 bytes
SHA-256: 1a4214fc443ea19559d34a0f6a8f2455bd995a09d57ee7630487c1c521065f19

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