Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c683007b5f9e19b…

MALICIOUS

PDF

74.0 KB Created: 2021-04-06 03:18:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9926e9ba891d23f12c9478ca72f80dd3 SHA-1: a2591d8dc8050ce02d70eaa46c65ac114fb412c8 SHA-256: 0c683007b5f9e19bde961f47a36034e8f6f50d4418ef650675f174c8193cb087
156 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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://vilenefex.ru/award?keyword=astm+a325+torque+pdf PDF link annotation
    • https://kazofinuso.weebly.com/uploads/1/3/4/3/134369681/6738282.pdfIn PDF document text
    • http://itasummer.fun/microprocessor_8085_objective_questions_and_answers8691s.pdfIn PDF document text
    • http://igonlinesupport.com/862010343719bsyu.pdfIn PDF document text
    • https://pofogixalozog.weebly.com/uploads/1/3/5/3/135346485/ruxufum.pdfIn PDF document text
    • https://kunokepipadiri.weebly.com/uploads/1/3/3/9/133997431/f9862.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403276/normal_5fcd71296f3de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454809/normal_5ff2585e6c332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376857/normal_6069ddbd72d19.pdfIn PDF document text
    • https://tadesurirow.weebly.com/uploads/1/3/2/7/132711952/buzetakokubibigepovu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409123/normal_5ff774a26eb24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447880/normal_5ff67f3a113d5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/js-_xlsx_json_to_sheet_example.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/guzosejanotini.pdfIn PDF document text
    • https://3315be42-5dab-4b6e-b44d-105cb490973e.filesusr.com/ugd/2e3488_1a469a7454af42d3a1cfc3703461e61c.pdf?index=trueIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_c5605d5a3dde4d55b96df8ea03058985.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/bells_palsy_meaning_in_tamil.pdfIn PDF document text
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_1e7661bd942a4325b47bef6c5b44edd2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/minabiwa/18._2_conjunctions_and_interjections_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/all_india_reporter_law_journal.pdfIn PDF document text
    • https://3ced707c-20bd-49bb-93f1-edb15be4e391.filesusr.com/ugd/e90305_f6a1b5ff210f4848bc420df91c989e30.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DD 5688 bytes
SHA-256: a00641ccfda37eec91ca15f98626b1f74083d1d5d3fe0fbe4f476cad0b7aca1f
font_01_sfnt_off0000f826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF826 10252 bytes
SHA-256: d7585526a45ec89a4b430146196b2144d12c811d5aa0b941b6fe2940b4ad85a9

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