Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4eeebf521be5094…

MALICIOUS

PDF

77.2 KB Created: 2021-05-19 14:34:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8c8c87d36593adb236a0b00dca25924b SHA-1: 525f8c4d7c582ca519c41cfbc20071786a027fd1 SHA-256: e4eeebf521be5094a5430d058463dca90fcf2fd47b3cf80650e66160d621051d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/strik?utm_term=where+is+car+seat+expiration+date+located PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4530070/normal_5ff1531c3d8e1.pdfIn PDF document text
    • https://boxotegiperofog.weebly.com/uploads/1/3/1/3/131398000/2599647.pdfIn PDF document text
    • https://mavuzoxawajike.weebly.com/uploads/1/3/0/9/130969593/1970533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_60479dd0a84ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464995/normal_604f542d4d217.pdfIn PDF document text
    • https://bokakarepexopo.weebly.com/uploads/1/3/4/7/134750167/juzaporut_xogibojegonap_larimim_xonosumewebuje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451363/normal_5fd102efdcc7b.pdfIn PDF document text
    • https://jezugazaditok.weebly.com/uploads/1/3/4/6/134601365/zasotiguxakates_rifosolig_tijukodugopavu.pdfIn PDF document text
    • https://tokuzowavabiv.weebly.com/uploads/1/3/4/8/134867887/4181161.pdfIn PDF document text
    • https://ravikuzisuwu.weebly.com/uploads/1/3/4/4/134470025/dexuwopelo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485587/normal_6021a320144db.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gasodamuza/sharepoint_designer_2013_list_workflow_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28ac679e-3188-4812-b709-33167dbc7742/modiganuguwixew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e859f91f-fd2a-4cff-b17a-1d1d1b2d34d7/sat_practice_test_10_answers_explanations.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/sawuxewixuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78e7d3b9-c7b2-4b22-81a6-096dda51de48/36122389372.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE591 5028 bytes
SHA-256: 5d09b594ab49fc810260e9b41a2c05d578cdecca7626a0b6c4c2ea16a348c640
font_01_sfnt_off0000f6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A5 10176 bytes
SHA-256: 437465052026ce7af654b3d443f05f1b866377ebfba31ff3af66c7b5679e13a4
font_02_sfnt_off0001195b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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