Malicious PDF — malware analysis report

Static analysis result for SHA-256 520abd8210cfc6e4…

MALICIOUS

PDF

80.5 KB Created: 2021-09-17 19:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 05e0a784a3b0fb1c3628419016b888ef SHA-1: a07a454270527f05949a0ff07bd3c38997051252 SHA-256: 520abd8210cfc6e4a088f65f7729966fae3b14dafcacffb0ac4b679924d1fba1
146 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a large number of embedded URIs, many pointing to disposable domains or IP addresses, indicating a link farm designed to host malicious content or phishing pages. The document's structure and numerous external links suggest it is intended to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://garglob.ru/uplcv?utm_term=how+to+record+audio+in+android PDF link annotation
    • http://artdental.hu/editor_up/nadum.pdfIn PDF document text
    • https://kawanmto.info/contents/files/lelegoninulegale.pdfIn PDF document text
    • http://interroadholland.nl/userfiles/file/83461942253.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/vepen.pdfIn PDF document text
    • http://sinostandards.net/upload/files/dejaviduduwejetopu.pdfIn PDF document text
    • https://trade.inter-ural.ru/ckfinder/userfiles/files/tuwiwigezepiwerarupesenuk.pdfIn PDF document text
    • http://primaria-ciocirlia.ro/media/file/derojoxagopabixodatekuwid.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137aba35a604---23349312755.pdfIn PDF document text
    • https://nomortiga.com/contents/files/81402925602.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/debesobefekoxesav.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140d013e030b---vezonosirutogasulivel.pdfPDF link annotation
    • https://mahae.hu/files/files/kuravaresukirufos.pdfIn PDF document text
    • http://leaders-adv.net/userfiles/file/26774619210.pdfIn PDF document text
    • http://farashimirooz.com/files/kuvaruf.pdfIn PDF document text
    • https://braveathlete.net/geektic/files/kutexozaku.pdfIn PDF document text
    • http://novelinternationalschool.com/ckfinder/userfiles/files/tajisipeluw.pdfIn PDF document text
    • https://mytopics.it/uploads/file/70916830094.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/22924357105.pdfIn PDF document text
    • https://lanjutpt1.com/contents/files/46269457108.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613133fadf964---15438379440.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/29636702814.pdfIn PDF document text
    • http://odessawa.com/userfiles/file/poderoxarav.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_off0000d75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75F 10328 bytes
SHA-256: 1692a94414184450216ccb7e64186638228ce716cf86a662b2c628539313b829
font_01_sfnt_off0000eec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC3 17656 bytes
SHA-256: 6a89004f3c71e0316f4396a87cfe143fe6f8eb2a858f19f0b6c64099a830d715
font_02_sfnt_off00011cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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