Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d7d1f5a81f07fd1…

MALICIOUS

PDF

77.0 KB Created: 2021-03-04 03:48:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8c561536f19f245335b327d90844f13e SHA-1: eaee8ff22d354a988d671440f0f3a8ecac0d3b83 SHA-256: 2d7d1f5a81f07fd1c9fb8650879796682f8a1e5e9273fab5d2481947a5caa9b9
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-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://resalured.ru/123?utm_term=what+are+normal+oxygen+levels+for+someone+with+copd PDF link annotation
    • https://cdn.sqhk.co/subilikiwi/Yjdx7id/sunglow_motley_corn_snake.pdfIn PDF document text
    • https://jodaxirijiv.weebly.com/uploads/1/3/0/7/130776114/gexafipub.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/gjhbMmW/xojirajofubofuzemuvov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451757/normal_5ff02a48e173b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407314/normal_6024c0cd03cf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463005/normal_60148c544329b.pdfIn PDF document text
    • https://cdn.sqhk.co/lusesito/ghzMhcb/scrabble_word_finder_word_builder_words_with_friends.pdfIn PDF document text
    • http://itsamorem.com/53226724192d3quk.pdfIn PDF document text
    • http://procripton.com/rudipokawur1uk24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392470/normal_5fcc0c12d23b0.pdfIn PDF document text
    • http://securityverifiedservices.com/55692096920qe4s3.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/2116765.pdfIn PDF document text
    • https://vexinafofonazes.weebly.com/uploads/1/3/1/8/131871992/zuxaduxoz.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/QjgjaJW/ponugexuxokiv.pdfIn PDF document text
    • http://gododerur.66ghz.com/lata_shastri_krishna_bhajan_audio.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tokavasetalan.epizy.com/rafagelelalot.pdfIn PDF document text
    • http://bupuboteba.epizy.com/catalogue_ph_kin_hafele.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_off0000ed6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6B 5904 bytes
SHA-256: 3a95367cee7485f15ddc3092f83965eff6ebb0c431797184aa6aaf12dfc915d5
font_01_sfnt_off0001018c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018C 10928 bytes
SHA-256: d9a7f338adfb592dc2750ea380d6c0cc61489837fce0a53fcd450e60967eba5b

Open this report in the interactive analyzer, or submit your own file for analysis.