Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae08617ae5189478…

MALICIOUS

PDF

77.6 KB Created: 2021-02-21 22:42:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b00d73902f732430c34f16db07be42ab SHA-1: 42f82e6874be7dfeede94163cc7e7137f48b646b SHA-256: ae08617ae5189478d5d0767dff0d9bf8d824d566808ef0950eac721aa4b662d8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and a heuristic identified it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://druttle.ru/wix?keyword=insight+cable+tv+guide+tonight PDF link annotation
    • https://nebakeji.weebly.com/uploads/1/3/4/6/134649015/kiwulezabazesaramo.pdfIn PDF document text
    • http://teplotronic.ru/51120488402rt288.pdfIn PDF document text
    • http://wovegibexakebof.iblogger.org/rufabolin.pdfIn PDF document text
    • https://birivuben.weebly.com/uploads/1/3/4/6/134618962/8063821.pdfIn PDF document text
    • https://vefurubaturuxal.weebly.com/uploads/1/3/0/7/130739777/kewunajud.pdfIn PDF document text
    • http://vawafaxas.iblogger.org/subed.pdfIn PDF document text
    • https://pesadoxemanuz.weebly.com/uploads/1/3/4/8/134852899/939ce0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gunexukod.epizy.com/prendas_de_vestir_en_frances.pdfIn PDF document text
    • http://pebeminozari.epizy.com/can_kindle_read_books.pdfIn PDF document text
    • http://pivirujifija.epizy.com/boyzone_albums_free.pdfIn PDF document text
    • http://wepatimaleb.epizy.com/gexobisovut.pdfIn PDF document text
    • http://sivuvupaxiju.rf.gd/tolususurufelugu.pdfIn PDF document text
    • http://banobozibijur.epizy.com/free_fax_cover_sheet_google_docs.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/booty_farm_mod_apk_4._2.pdfIn PDF document text
    • http://gokobuvutojo.epizy.com/61319273567.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_off0000f3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E5 5240 bytes
SHA-256: 9298127bd61064018b66c0a46f13b378db89841cd6c5503040f1408b8f179f58
font_01_sfnt_off000105bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BD 10476 bytes
SHA-256: 02a6820861d0a90d6d1edcc4ad9ae57375fba8d56a33204cb936ce73566ce89d

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