Malicious PDF — malware analysis report

Static analysis result for SHA-256 d08d6e3a6a50a2b6…

MALICIOUS

PDF

77.5 KB Created: 2021-03-13 22:08:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2395f746d99b4addcccc15585f217685 SHA-1: 232020baf4519a01724e4094174546afd9c2b00e SHA-256: d08d6e3a6a50a2b66b67f06603e3c37a5951dfc8c6a91d51f662d5c6688e9685
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 0.9996

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=9001+iso+2015+clauses+ppt PDF link annotation
    • https://nusazipupuw.weebly.com/uploads/1/3/4/0/134042511/fenufela.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/international_student_marketing_manager_job_description.pdfIn PDF document text
    • http://jiviruke.iblogger.org/wall_street_journal_digital_edition_login.pdfIn PDF document text
    • https://vupudirul.weebly.com/uploads/1/3/0/8/130874586/fb1e9d28.pdfIn PDF document text
    • http://bexowobiminefi.mywebcommunity.org/fopivugomugisome.pdfIn PDF document text
    • http://nupesupo.mypressonline.com/how_do_you_calculate_the_flow_rate_of_a_heat_exchanger.pdfIn PDF document text
    • https://giwesozuxazo.weebly.com/uploads/1/3/4/4/134478021/fabivu-fetuwujolozako.pdfIn PDF document text
    • https://sosakenokez.weebly.com/uploads/1/3/4/4/134445245/bubigodojab-wimiwun.pdfIn PDF document text
    • https://sesuzefodapu.weebly.com/uploads/1/3/2/8/132815176/lokikapumidup-bapew-tanivex.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
    • http://jezevenakos.myartsonline.com/problemas_de_estadistica_inferencial_prueba_de_hipotesis.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/premiere_pro_transitions_between_clips.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7e726c5-4d10-41d3-a36c-7b33eebf9a66/tissot_1853_chronograph_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/ielts_writing_vocabulary_task_2.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/93850510302.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/pirepowerejunamadizotu.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/clickshare_cse-_200_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/40331430471.pdfIn PDF document text
    • http://zipodanej.rf.gd/hodder_education_double_award_science_textbook_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/426ac3e9-7154-4f34-9952-b9172da768a3/98214700331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45314990-2172-4b34-9d46-12ff16330d01/what_does_code_do_mean_on_frigidaire_dehumidifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/229a3f78-5b29-422c-96f6-735902f7f4a9/how_to_get_flash_plugin_on_chrome.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31B 5116 bytes
SHA-256: 7a85ce641dbd835454bc700e0d2e979bc36090644643eac19058d7ba391466ff
font_01_sfnt_off0000f486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF486 10740 bytes
SHA-256: 27c8128e6b5822631caf5ef70c263c8f3b42c7f7857f1031240313701f059258
font_02_sfnt_off00011912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11912 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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