Malicious PDF — malware analysis report

Static analysis result for SHA-256 39767ee32132f2a4…

MALICIOUS

PDF

75.4 KB Created: 2021-06-05 09:34:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 16325a915cf79f63285ba0452e505b85 SHA-1: c65a03313bcced5a7a17e1901ffe4a92d10ae88b SHA-256: 39767ee32132f2a41cb88a436bc9bd1a5eaf03b03a34efbccae48b2e48085faf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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://inwebjor.ru/pbw?utm_term=eu+gmp+guidelines+part+ii+annex+15 PDF link annotation
    • https://luzusuzure.weebly.com/uploads/1/3/0/7/130775685/1767652.pdfIn PDF document text
    • https://jodawozuwiki.weebly.com/uploads/1/3/1/4/131437728/zazepazuv.pdfIn PDF document text
    • https://wivezinafixozut.weebly.com/uploads/1/3/0/9/130969190/mepuzepapi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483104/normal_6027de7bac05c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502567/normal_6001740aef209.pdfIn PDF document text
    • https://webebusili.weebly.com/uploads/1/3/0/9/130969565/7cd7d9452a4.pdfIn PDF document text
    • https://dupuzebor.weebly.com/uploads/1/3/4/6/134639309/joxifoj-kakexisumel.pdfIn PDF document text
    • https://rizibibaruf.weebly.com/uploads/1/3/5/3/135383358/zitobewiwukope_zopaxajibo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472760/normal_5fdcf3a3f0986.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470524/normal_606b4504de336.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5e6080c-618d-4a16-b30a-7852e1d79094/fawinuremug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68d7c862-43da-4aee-a540-1522f382d46b/74230443659.pdfIn PDF document text
    • http://vifogajo.pbworks.com/w/file/fetch/144499452/wedoseve.pdfIn PDF document text
    • http://sajateves.pbworks.com/f/basic_audio_amplifier_circuit_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20f8aade-6740-4828-add2-20065226696d/how_to_tell_if_dirt_bike_is_running_lean.pdfIn PDF document text
    • http://zuwofig.pbworks.com/w/file/fetch/144643821/how_to_teach_cornell_note_taking_method.pdfIn PDF document text
    • http://lijegazoz.pbworks.com/f/cost_to_replace_flame_sensor_on_furnace.pdfIn PDF document text
    • http://genarozep.pbworks.com/w/file/fetch/144637491/99306984580.pdfIn PDF document text
    • http://laxaxufudej.pbworks.com/w/file/fetch/144508902/los_titanes_dioses_griegos_de_percy_jackson.pdfIn PDF document text
    • http://lurilimid.pbworks.com/f/78330374040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35f00d9e-6243-4999-9010-904ef6d984a8/que_es_un_guru_informatica.pdfIn PDF document text
    • http://zopilep.pbworks.com/w/file/fetch/144647583/download_novel_silence_akiyoshi_rikako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0a0175a-05b6-4b34-ae75-b338414b6bc1/sample_covid_safety_plan_for_construction.pdfIn PDF document text
    • http://natizasex.pbworks.com/w/file/fetch/144592527/48096479174.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE833 5480 bytes
SHA-256: 5ade15dea9bc822a7acc660a0f4733d22c5b5af6a71db82b0d178f1473bf4064
font_01_sfnt_off0000face.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACE 11232 bytes
SHA-256: 10306f9f93331ba479e7c2ed06cc411e9c5d922859eff43d964b2a73d72953ca

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