Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8e2419c3edd056a…

MALICIOUS

PDF

75.2 KB Created: 2021-04-24 04:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d822e8d04538801a0411c58bad88e305 SHA-1: 41797a3bbf4d64b56e57003a46040dedd7ea450d SHA-256: e8e2419c3edd056a685ae6e24ab9a7deb6b9584a0ea54fffc70542619a7d5d92
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 0.9998

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://pelibifir.ru/strik?utm_term=what+type+of+pipe+is+used+for+diesel+fuel PDF link annotation
    • http://kusufuxufatup.getenjoyment.net/como_sacar_certificado_de_secundaria.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371799/normal_5fe01d9f790ab.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/base64_string_to_html.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465252/normal_600b55b69fd6d.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/Fgfheic/voruzezinusezivemofinegi.pdfIn PDF document text
    • http://gojovujewinunuj.mygamesonline.org/84807041617.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/jbheido/suzojupu.pdfIn PDF document text
    • http://molufipet.sportsontheweb.net/56822139414.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/gi51o2Q/96953959760.pdfIn PDF document text
    • http://giwitijudaleka.mygamesonline.org/94314540745.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/kodipopujufipig/tozawikoxoxajum.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/how_much_to_get_iso_9001_certification.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/75869437687.pdfIn PDF document text
    • http://wemaxoseni.myartsonline.com/austin_kleon_steal_like_an_artist.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/plate_tectonics_activity_worksheet.pdfIn PDF document text
    • https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_3c772ad5e8614b018ae38c3bdd21f556.pdf?index=trueIn PDF document text
    • https://80cb706b-a9cc-40e6-9cd2-ad5688d6c4a8.filesusr.com/ugd/c84a73_aaa23f443a5f462b868c32f78f21adbf.pdf?index=trueIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_9702a5254db54922bfb6745b1d3839e2.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_off0000e9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F6 5244 bytes
SHA-256: 428dabc8c4f3feb0ac1b633f9471416ad6fc876a4a0616be34b390f1b21b477b
font_01_sfnt_off0000fbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDC 10484 bytes
SHA-256: 9d1ea920705488b443c36677617c58f81db5cc703cabc19c7481854ae217c920

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