Malicious PDF — malware analysis report

Static analysis result for SHA-256 57da12f46b71ac7a…

MALICIOUS

PDF

74.8 KB Created: 2021-03-07 09:00:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cfeab0c5a6c242eb268c828465d974d4 SHA-1: d247c368589ef94c42e07ecd2fa1d3886f663413 SHA-256: 57da12f46b71ac7ad5e7dfac6699921ae1334ae6ab9b25efcd3be8bb71a5c1d0
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 0.9993

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 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://xezojetit.ru/strik?utm_term=shoprider+deluxe+scooter+accessories PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407780/normal_6031ba20c0eae.pdfIn PDF document text
    • https://sujepofuk.weebly.com/uploads/1/3/0/7/130775011/mofaredodewiv.pdfIn PDF document text
    • https://jetovalanowu.weebly.com/uploads/1/3/0/7/130739462/sonasedaxugevaveto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403819/normal_601cc91f37fa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369494/normal_5fe8f10fd649c.pdfIn PDF document text
    • http://hargotel.xyz/stub_acme_thread_calculator_excel5jr6u.pdfIn PDF document text
    • http://verenica.net/how_to_write_a_newspaper_interview8wqmf.pdfIn PDF document text
    • https://gegaminowudajun.weebly.com/uploads/1/3/4/0/134041134/lovenugofibivutofuku.pdfIn PDF document text
    • https://dajidavibaral.weebly.com/uploads/1/3/4/6/134606929/damexut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368494/normal_5fc9a25a80536.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/dekogamik/management_team_profile_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/bcit_registration_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c460479-2c48-43a6-8656-88cee41cc279/cloud_security_alliance_star_accreditation.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/lugizutelepirogexutemifov.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/agroforestry_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0c65410-1fe4-44db-b070-bba90c3a1e0f/88812200267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b6c6ff2-ba1d-42d1-b40c-2553f49c8c9f/91782536325.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/free_geometry_worksheets_7th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/balance_sheet_format_as_per_companies_act.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09ccc1f3-c7cd-4343-959f-8daea5eeb0ec/9386926862.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/samsung_chromebook_xe303c12_os.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/jixufapimira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ce93315-d3cf-4482-823a-257a3ee56470/15777238314.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_off0000e49c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49C 5332 bytes
SHA-256: 86ccd41724add119e14d502fe57b2615c75f01ff7d0712d45fd9190a8a2fc30a
font_01_sfnt_off0000f6bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BB 11416 bytes
SHA-256: d5d506c9502c4ee59e01557639ca021e8da3ad6f19f4e33059e9a7fdea2f7d41

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