Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fbd6cfbb6f6ec63…

MALICIOUS

PDF

125.5 KB Created: 2021-06-11 09:20:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c97543f9f299b90b4f8f9e2d0d5e2599 SHA-1: 74c6b5d1498b98bee12977854bb343937ab9f0dd SHA-256: 5fbd6cfbb6f6ec637c09d5c33a1c6dccd1990632b9d59e54a9c604d05262f576
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document exhibits characteristics of a phishing lure, indicated by the 'SE_PASSWORD_ARCHIVE_LURE' heuristic and numerous embedded URLs pointing to compromised WordPress sites. The document likely aims to trick users into downloading a password-protected archive, with the intention of delivering a malicious payload that bypasses security filters. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://laborke.ru/uplcv?utm_term=dil+hai+tumhara+singer PDF link annotation
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/c0b2815cc582f7f60f1bfe55b6f7797b/bulaxetafumenujok.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b71608c44da---patemewewobasoxavikuri.pdfIn PDF document text
    • https://nada70.org/userfiles/file/67949091467.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/f7005094c2ccaeb181a15e83a19b177f/lugipujotoje.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607957f5317ad---zojatuvupox.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/susapakulogofunapopa.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/489e34379262c60b0b159909b9d070ec/magabitemavuwusege.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/3j2s95rl3q7et8vi68igbc2cd7/riripusazopikis.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/99190480535.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/c4cf5afb01e8abb584d5e0c49e8c4a6b/tigakulepejatulunameramox.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1bc133893b---91388719863.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/9d4209967c24f0982d70d4bf63ce4c79/xawezomab.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a913c89b621---sadujevevu.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/4636f3792045d096a429385553698077/7205594803.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc9c1f8a1a3---jejeketuzejigofefobidu.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160988308013e5---35491345698.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000195bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195BD 5096 bytes
SHA-256: d58cf57a1906c2473636dcbdd6a1d642cdbd48ff700ba8abbeafbb446058b5de
font_01_sfnt_off0001a6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6E7 11220 bytes
SHA-256: d1aaa9644f395ce2d827796efebf4e2013b490bb8da79c9d5880d4a4ce12a5c3
font_02_sfnt_off0001cd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD5C 8548 bytes
SHA-256: 12bf37f62a6e29912a21790c9cf919f08f182a6468a019dbe2ffc977bc0d9eb8

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