Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfbda1d45557ef05…

MALICIOUS

PDF

77.3 KB Created: 2021-03-31 18:09:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: eec91decea35da2bcd72e0cd1df53376 SHA-1: 57d31b326cdf766dd21efa5c15bd90d5954e3ff0 SHA-256: dfbda1d45557ef053fac7a4409cf2f9a01f07c9f65a7e07f83cd6dae16ad05eb
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 0.9993

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 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://nipisod.ru/strik?utm_term=joe+vitale+sayreville+nj PDF link annotation
    • https://nepubodi.weebly.com/uploads/1/3/4/6/134610278/morefelanizok.pdfIn PDF document text
    • https://dolevomebebozap.weebly.com/uploads/1/3/1/6/131636651/3227312.pdfIn PDF document text
    • http://pubguckazan.com/waferinuno6w616.pdfIn PDF document text
    • http://drovazvenigorod.ru/wisewubozerowiwu5yrtt.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/astrophil_and_stella.pdfIn PDF document text
    • https://xegunato.weebly.com/uploads/1/3/4/3/134315925/08133f9c.pdfIn PDF document text
    • http://gezakiribonenin.mywebcommunity.org/modern_auditing_assurance_services.pdfIn PDF document text
    • http://pakefuvinaput.22web.org/wearable_biosensors_seminar_report.pdfIn PDF document text
    • http://fimufajupasi.22web.org/pasokonuruzokavikik.pdfIn PDF document text
    • http://zuragaretezi.iblogger.org/age_of_empires_1_civilizations_guide.pdfIn PDF document text
    • https://suzefajadovu.weebly.com/uploads/1/3/4/5/134592553/viloxog-fumumonixak-komodo.pdfIn PDF document text
    • http://idealicacolumbia.site/how_gravity_affect_time9n10x.pdfIn PDF document text
    • http://vashmaster.info/804338619571gfr1.pdfIn PDF document text
    • http://dazedovepiza.iblogger.org/chch_rates_information.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sonisan.epizy.com/d_d_character_builder_guide.pdfIn PDF document text
    • http://velikuwuso.rf.gd/mathematical_reasoning_class_11.pdfIn PDF document text
    • http://bavabime.rf.gd/169091670.pdfIn PDF document text
    • http://bototiluwoge.atwebpages.com/demat_account_format.pdfIn PDF document text
    • http://dudadiba.epizy.com/93237588188.pdfIn PDF document text
    • http://pavabiza.atwebpages.com/applied_heterogeneous_catalysis.pdfIn PDF document text
    • http://fadevosozegula.epizy.com/59977541668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/966bdcdb-a5d3-4d5a-84d9-c7029ddedf00/what_happened_to_michael_burry_twitter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a416afa-f6e7-424c-b8c2-0be4d05fb0c2/70456984348.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_off0000f26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26F 4904 bytes
SHA-256: 528e0784a1c2904a899c6a4b7ab4bc6e2212882db879b59b2e1e66645332019f
font_01_sfnt_off00010339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10339 10692 bytes
SHA-256: 72848e1614c94f4e75c32966e6a9892cf22a6ffa138b7af0f92e6cc8ec3a237d

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