Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea39ae7e0b42cfb5…

MALICIOUS

PDF

94.8 KB Created: 2021-08-08 13:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 09913f9564cba64b4387145902e46bba SHA-1: 4b5b63169f11129dc5eccde7c011ed2f8194de26 SHA-256: ea39ae7e0b42cfb5e4e6aab3f0e2748a805ddb81c8b8cf665e80fd11ad7a7a9b
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised CMS upload locations and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/4d536e09a3484398d0003761c9d3f8e2/45566007096.pdf In PDF document text
    • http://faceconnects.com/ci/userfiles/files/33654985955.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/88348116691.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16105e31558937---93395865156.pdfIn PDF document text
    • http://lagostena.it/userfiles/files/wejoragujibibiwokifi.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3bd14f2a9---towomusinufopujabepir.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/mduv6e2fsn6birr4v02ebg7lts/bigijobaxodove.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4e9c68c22---24794068968.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/g9kij03ou7siorpk9qo40cil24/wataxunujopawexerowo.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/15261550152.pdfIn PDF document text
    • https://ksdc.in/userfiles/file/66995760754.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/bnks79e9q6qutd551ggubvakp6/61595071623.pdfIn PDF document text
    • http://opuspointpartner.com/ckfinder/userfiles/files/rikosirulosigedolozof.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/zesumasonafux.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078b7df5abb0---fokivizudabajira.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d05254527d0---71886712667.pdfIn PDF document text
    • https://kueapem.com/contents//files/josuxowu.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/842ac071631ed3383f3168f3ff772e69/loxotizepatinewubum.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/rukawoz.pdfIn PDF document text
    • http://aromaonly1.com/yamituki-n/uploads/files/85489096672.pdfIn PDF document text
    • http://pritchardreunion.com/clients/81409/File/67115599769.pdfIn PDF document text
    • http://dienvietbac.com/uploads/files/18501113386.pdfIn PDF document text
    • https://murten-hotel.ch/userfiles/files/vizajomilajori.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+many+murders+in+los+angeles+2020PDF 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_off00010bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC7 11024 bytes
SHA-256: 5dbfb3d9324814af388183212955b99a81392d4bd29b9a394fb8fd107d067639
font_01_sfnt_off00012536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12536 17644 bytes
SHA-256: f62028355678bd2a32af36ba0ab85784cb0519ba1646e670716017a0df855e53
font_02_sfnt_off000152d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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