Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dd7e3c10a590b8a…

MALICIOUS

PDF

82.0 KB Created: 2021-09-10 23:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 5f948899d3c3b19db0058f50ae5e9fc9 SHA-1: 9a323ea80679e31a8ae746b78addfa3e667d0a25 SHA-256: 5dd7e3c10a590b8a7caf7c59615fb717c7591b6178da6dc8f9a23b0b2003f777
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://allytemp.ru/uplcv?utm_term=koplayer+download+for+pc PDF link annotation
    • https://debcopharma.com/userfiles/file/53905534636.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/guvanumasoletasodivo.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/34796096556.pdfIn PDF document text
    • http://change4best.ru/upload/file/todojur.pdfIn PDF document text
    • http://ateliergermain.org/sites/default/files/file/folusifixij.pdfIn PDF document text
    • http://zbigniewrodak.pl/galeria/file/lobawevos.pdfIn PDF document text
    • http://chip-chup.hu/upload/file/rokagufepulazasavituvokok.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/madunorofezavufojareza.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/d37de338add2e92e4aef653447a8e938/ganobosexeratexisitir.pdfIn PDF document text
    • http://yejiya.com/userfiles/file/vedudo.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/pugatadoto.pdfIn PDF document text
    • http://stringquartet.biz/web/images/fck/file/dijog.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/xosomozobojimeturakit.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613335c856395---49737001151.pdfIn PDF document text
    • http://gbfrjournal.org/pds/userfiles/files/tolexarakedezumisejufo.pdfIn PDF document text
    • http://dade666.com/userfiles/202109file/2021090722193470554.pdfIn PDF document text
    • https://tspinstruments.com/cache/fck_files/file/goditinuvizomugolirumu.pdfIn PDF document text
    • http://mfahk.com/upload/files/90729142531.pdfIn PDF document text
    • https://listocrm.com/userfiles/files/lavipofirojufadiregazep.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/7803838072.pdfIn PDF document text
    • http://sushistoryus.com/uploads/files/zosedafokodagu.pdfIn PDF document text
    • http://unewstoday.com/task/userimages/file/46410064985.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/novasajizo.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_off0000db95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AC 10444 bytes
SHA-256: 8fd06db4e7bc2afda29cc770fb1f3702611a138351494bcd1ec59736bfc2d224
font_02_sfnt_off00010b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B91 18192 bytes
SHA-256: 8448f0605e1c4ea4960853a1ebf2e87ee705fba173051a5da38815de2f68d95f

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