Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbca63fc8cf7a02b…

MALICIOUS

PDF

71.7 KB Created: 2021-03-22 19:07:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a2aefed1835637ac687f774a46a343ba SHA-1: cf60faa29d6547ad60837da4d5dbe3cb0ef39afd SHA-256: cbca63fc8cf7a02b1ed67d029a2333873e3f7c0eb14abb9fa4e940881aadee96
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 0.9998

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://golowaki.ru/award?keyword=present+and+past+tenses+exercises+pdf+with+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490122/normal_601ba5ea3ec4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370303/normal_60518185d0ae9.pdfIn PDF document text
    • http://liwitesuzemumex.sportsontheweb.net/jurnal_asma_pada_anak.pdfIn PDF document text
    • http://folugomobok.getenjoyment.net/fivozutefevoxujotapetefi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411700/normal_60244630ebc47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486963/normal_6038d61187a37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365653/normal_5ffa94f9e81ed.pdfIn PDF document text
    • http://tuzojexis.mypressonline.com/catalogo_eudora_ciclo_5.pdfIn PDF document text
    • http://valupimabo.22web.org/gillanders_arbuthnot_co._ltd_annual_report.pdfIn PDF document text
    • http://zonojebiridizo.mywebcommunity.org/juzataluxegozetewidatima.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/dbaa0814-55d9-45f0-b5bf-2009a7f4f7db/yaskawa_ac_drive_v1000_manual_portugues.pdfIn PDF document text
    • http://miviloliwibo.rf.gd/momegonipevuguvupijo.pdfIn PDF document text
    • http://rawuvotatu.rf.gd/behavioural_interview_questions_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e45a965b-65d2-4425-8478-979872dd23ac/what_does_it_mean_when_all_your_dashboard_lights_come_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09b12564-4312-4248-be12-254ecd170674/medieval_2_total_war_best_mods_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/rental_agreement_sample_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/797547b4-e5d1-4e22-bb37-853dfb84fe30/jesus_camina_sobre_las_aguas_significado.pdfIn PDF document text
    • http://perunibasud.epizy.com/wobefaxesubexetuxadokij.pdfIn PDF document text
    • http://fufibilola.epizy.com/lightroom_wedding_presets_free_zip.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/milady_standard_cosmetology_theory_workbook.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_off0000da9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9E 5372 bytes
SHA-256: 606a62217d654f0ed9b0885190b57619d819857536c35c652724c7eadc1cc193
font_01_sfnt_off0000ecf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF9 10640 bytes
SHA-256: d5c9172ba3d94687af26256b14d9c78d89e260bf4b00589061cef730affed97f

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