Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e5060675397cca4…

MALICIOUS

PDF

96.5 KB Created: 2021-06-27 05:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 337ba0dac4db75b09e7bf931685cee0e SHA-1: 8452260c298a005fc70ad4e769fb31bb83da9809 SHA-256: 8e5060675397cca4c488ac74b98b6e721227f7e6bdc31696ba4866bcd39cbbdd
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The PDF structure itself does not contain executable content, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/92b1a141940bd2492f4c157c2209480e/lilavezalexo.pdf In PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/lobepox.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/t1mbmmfi5oav0oim844upk16sg/wabonaloxikojotekiko.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/gigigugufil.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/65241797863.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/08313fee58fd0e25f0dcc6b16b2afb37/sowepuwikitemegoguzifepo.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/lenivewafipusujizuxun.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/4824194091.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/b8bm3itogaijmpe8vhn4oid1j1/zisaxipesusob.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/f086f853d519b491da7d9e2e7d9abedd/97791112746.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607696580639f---delokakerabezimelikojaze.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/lobuloxixofexabitamonol.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c95bcb8f908---zukabutefubo.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725433be5b4---9103600069.pdfIn PDF document text
    • https://babamore.com/upload/ckfinder_temp/files/20210605180039.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/26664436521.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca666e25a5---vupasatofama.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/06/files/210613135559.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd8f5f3040---60633968457.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/34459878577.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a980fadfc5d---59648164744.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/jevapebiwuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=two+synthetic+auxins+arePDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091cc1313f6c---3226738201.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_off00011984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11984 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13196 16688 bytes
SHA-256: a44596e516b7920f654fdcde61510a39d8fa8e358ec3f959ec16f548424333f6
font_02_sfnt_off00015cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CB3 10644 bytes
SHA-256: c53b5be6226b40956b43e1af478f13caa585ec38ca33fb7cac7054b81e6c5941

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