Malicious PDF — malware analysis report

Static analysis result for SHA-256 379b3041f86d01c6…

MALICIOUS

PDF

80.0 KB Created: 2021-02-15 16:17:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fd426fd49500ad701b631f995254b8c1 SHA-1: 3b7756d3e27cd3c138fe0a5c75a1d2c65c181494 SHA-256: 379b3041f86d01c6a54f4afdeaa9bdab0c07687bfecc02caed87eecd926e2378
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the ML_NYX_PDF_MALICIOUS heuristic strongly indicate a phishing attempt or a downloader for further malicious activity.

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://jacksth.ru/123?utm_term=dream+of+teeth+falling+out+means+death PDF link annotation
    • https://cdn.sqhk.co/kanedufopuma/5btIjju/89732361875.pdfIn PDF document text
    • https://duzigolanulemo.weebly.com/uploads/1/3/2/6/132680867/2a2068bca64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464863/normal_5ff16db3394a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417998/normal_6008c09257360.pdfIn PDF document text
    • https://cdn.sqhk.co/detokelixipi/chidMhf/facts_about_marco_polo_family_background.pdfIn PDF document text
    • http://richteam.site/arrocera_oster_manualsqb1e.pdfIn PDF document text
    • https://rajexomogalifi.weebly.com/uploads/1/3/4/8/134891851/sewiw.pdfIn PDF document text
    • http://reliables.ru/62861905396i5am7.pdfIn PDF document text
    • http://realwockyc.info/zilibimukalikolad5qvl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447276/normal_5fda4687c643c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415304/normal_5fffe8c33b1d2.pdfIn PDF document text
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/suravopuxogigujumi.pdfIn PDF document text
    • https://cdn.sqhk.co/dimowitop/iaRJAkY/water_glassing_eggs_video.pdfIn PDF document text
    • https://podinelejuwe.weebly.com/uploads/1/3/2/7/132710627/8246646.pdfIn PDF document text
    • http://kilobowomix.22web.org/figumivi.pdfIn PDF document text
    • http://vakafubetax.iblogger.org/avg_antivirus_paid_apk.pdfIn PDF document text
    • http://ru-order-687646765445.art/76232956703y7ese.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://ravuxigud.epizy.com/tinorexalagetegor.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/xml_formatter_sql_server.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF40 5204 bytes
SHA-256: 70d58e523f249477797bd6ba55acbcdd548ee2660a01d2e88614bb8dddec1d67
font_01_sfnt_off000100c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C8 10560 bytes
SHA-256: 3fb49c0ac4082bdfc28dc999151942b94ca80a9771690b5ae4e351cee82fdee3
font_02_sfnt_off000124b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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