Malicious PDF — malware analysis report

Static analysis result for SHA-256 732baa05579a0e75…

MALICIOUS

PDF

76.4 KB Created: 2021-03-23 10:38:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ba6fac83b77b1cad55e260c394a4c561 SHA-1: bd2cd62fee3f94dd77e3588236e401035cd4170e SHA-256: 732baa05579a0e757e66313c348ad767ec4d9fab4ea7e18c64e3c83aa1354ea8
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://dugedepap.ru/wix?keyword=unblocked+games+stealing+the+diamond', appears to be a lure for potentially malicious content. The document structure and heuristics strongly suggest it's designed to redirect users to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/wix?keyword=unblocked+games+stealing+the+diamond PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368782/normal_5ffe94c2385cc.pdfIn PDF document text
    • http://thesimplycompleteseries.com/human_development_a_cultural_approach_1st_editionevglt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378406/normal_5fd2837807e4e.pdfIn PDF document text
    • https://pimizotola.weebly.com/uploads/1/3/4/7/134770615/1844622.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/422874921898yqut.pdfIn PDF document text
    • https://fojanatixisi.weebly.com/uploads/1/3/4/2/134265346/7391623.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478670/normal_603f4a8cd65ab.pdfIn PDF document text
    • http://ductsunlimitedins.com/5_ejemplos_de_cada_discurso_directo_e_indirectok6top.pdfIn PDF document text
    • https://rikizanasurixa.weebly.com/uploads/1/3/1/3/131379420/1251748.pdfIn PDF document text
    • https://matiposokatogu.weebly.com/uploads/1/3/0/7/130739068/387b31e6342.pdfIn PDF document text
    • http://domensita.fun/how_to_synchronize_atomic_clockn49lx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412774/normal_60446ec24244a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409796/normal_60020f2d3ae58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481164/normal_5fc67dc878ad0.pdfIn PDF document text
    • https://tirotirow.weebly.com/uploads/1/3/1/3/131380420/bba48b467.pdfIn PDF document text
    • https://wimukevefom.weebly.com/uploads/1/3/0/7/130739067/0811a89.pdfIn PDF document text
    • http://xavelodezazil.iblogger.org/27357248003.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vudexejuvejutek.rf.gd/best_stock_app_2020_reddit.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_off0000eae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE5 5452 bytes
SHA-256: ee3681eeedbcbb52a031fca453de255eaff43dff05a7e31d88221c26695bafce
font_01_sfnt_off0000fd4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4E 11576 bytes
SHA-256: 6dd73cbdde0d656cef49657a226549e11b5cfba73289b25a68231485cabf3c20

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