Malicious PDF — malware analysis report

Static analysis result for SHA-256 447545eea17ea200…

MALICIOUS

PDF

95.9 KB Created: 2021-06-30 01:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 09d636134c760be989e92f8b8590faa9 SHA-1: a2b9ca9993c0d446d272acae091cc1461b07c0fc SHA-256: 447545eea17ea200c07d3c2a7b17304b2ab856122d1d4dc17dc39d1f1cf6ecc4
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites, suggesting an attempt to lure users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a link farm used for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/0220a06ba3cd6233bd0667e7b4fec4d1/mifiwoxufimawos.pdf In PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099225b28de6---46079092238.pdfIn PDF document text
    • http://dpengineers.info/admin/userfiles/file/beripolelejanipe.pdfIn PDF document text
    • https://tonitomov.com/picture/file/86273067515.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/pagadupatejemijexitewo.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/tojapozetat.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/d8bbfd0e0c46445c0595ff385af6f2da/tewuwitatizozedodet.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8951c08165---57691723513.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c4f087381---lusexanutafulovox.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/8124748335.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/nebizamabosifomugisatez.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/73735267961.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/zogebog.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/31061211481.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/59881140145.pdfIn PDF document text
    • http://webursitet.org/Files/file/pubotad.pdfIn PDF document text
    • http://momsystem.ru/public/file/jusobidugasolaru.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160888973abfff---wujutituwefun.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/ce7d0146cf2992d92f01766ddb7f58c8/75343613327.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/wiziwedekufevuludaz.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607836218054b.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078768d3480e---dimawelevu.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2544e6cd51---vewexilefirezewunoletikis.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/cfe6748a954ab562aab4290de0fb874a/zonokibodifite.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+edit+pictures+in+pdf+formatPDF 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_off0001140d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140D 17196 bytes
SHA-256: d533ce51350be69fef6daabd64454802946366c317c1ce506e87c2edf4ac3891
font_01_sfnt_off000140df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140DF 10912 bytes
SHA-256: 33ed3aa432f2c85c3b495fc12be076a78dac140dd49b3cb0f735e2e38e70ef51
font_02_sfnt_off00015a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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