Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed9e90cd70ee563…

MALICIOUS

PDF

93.6 KB Created: 2021-05-03 03:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b5c25dc7949ba1ea5303e7caf4f148e1 SHA-1: c86ef0a2382ae085e743f3386c42e475e54236c8 SHA-256: 6ed9e90cd70ee563a426b4c80cd16344fce10444698a88c4c1d2c763e6dc61b9
166 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. It uses a password-protected-archive lure. 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 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jacksth.ru/strik?utm_term=what+is+social+constructivism+in+teaching PDF link annotation
    • http://devlp.club/fasapibujozinapepigozof2rxjs.pdfIn PDF document text
    • http://e-devletturkiyeaidatsistemimgovtr.com/xakifaminugafilegawufelp24u.pdfIn PDF document text
    • http://my-favshopg.online/309120054315rrkr.pdfIn PDF document text
    • https://cdn.sqhk.co/ninivaxibab/njachde/bmat_section_1_2018_explained_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/jcHitsK/the_farmhouse_menu_delavan_il.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwosexed/6ijhhjf/56455122448.pdfIn PDF document text
    • http://usesol.xyz/79225565575p8l4n.pdfIn PDF document text
    • https://cdn.sqhk.co/lanasido/ghgniaA/clases_de_fuego.pdfIn PDF document text
    • http://www.physiotherapy.ca/Practice-Resources,2.CanadiaIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/16879409761.pdfIn PDF document text
    • http://zarevamemamafo.rf.gd/nagafosa.pdfIn PDF document text
    • http://xakufidadalajup.epizy.com/wytyczne_bls_2015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/227fd568-62d3-4e69-aa5b-b3f2a3b050f5/verizon_router_change_admin_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ca4ef7b-3c34-4fcf-ab68-52e6adbf70b0/que_significa_retrato_para_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddcf02c8-0c63-45b0-81ae-b2d694c73b5f/sistema_muscular_humano.pdfIn PDF document text
    • http://vafukibugaf.epizy.com/65217464343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c383960-94ec-43a4-90b4-75efc591cbb5/earth_stove_100_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/76435410914.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13304 5284 bytes
SHA-256: e0a7ed3ccf93c75cd71b5213e81cfcd8da1082c1397ea83d085999daa1435bb9
font_01_sfnt_off000144e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144E7 10584 bytes
SHA-256: b7c3d075285afccc0285a3ebfd67079b5472dd751700882d656fc3371205bdd8

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