Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef44e6815a7669b…

MALICIOUS

PDF

73.6 KB Created: 2021-03-28 02:44:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 41caacb9967b827c17068220ff132cef SHA-1: edf5fc39b9efb97b3badb12b71fa8f0ee5b39ccf SHA-256: 7ef44e6815a7669b1093fcb981833324bc264e018d5780ab43f89939e0b16ec4
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 domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to lead users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/wix?keyword=xenoverse+2+god+of+destruction+clothes+mod PDF link annotation
    • http://fetoxuk.mywebcommunity.org/diathermy_download.pdfIn PDF document text
    • https://sozobuxetezubu.weebly.com/uploads/1/3/4/5/134527793/jabeji_tegifijoxan.pdfIn PDF document text
    • http://biggymstoe.com/good_evening_in_german_informal5vvsm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425224/normal_6041d582abd01.pdfIn PDF document text
    • https://gawofatofuwe.weebly.com/uploads/1/3/1/3/131380275/8535791.pdfIn PDF document text
    • https://mekowisegopoju.weebly.com/uploads/1/3/5/9/135963570/rinofu.pdfIn PDF document text
    • http://rabejagoruwobol.66ghz.com/acrobat_reader_gratis_italiano_windows_7.pdfIn PDF document text
    • http://seweripuwas.mywebcommunity.org/dragon_ball_super_broly_manga.pdfIn PDF document text
    • http://all-casino.xyz/bajosaba08af1.pdfIn PDF document text
    • http://yozi.store/lidugorejekogurudobss15.pdfIn PDF document text
    • http://1offpark.xyz/383887535183yesx.pdfIn PDF document text
    • https://tebivozov.weebly.com/uploads/1/3/2/7/132740763/2107678.pdfIn PDF document text
    • http://metoxegid.mygamesonline.org/ca_books_icai.pdfIn PDF document text
    • https://lededafekipolo.weebly.com/uploads/1/3/4/4/134404801/xubalilokatiwikubaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_602facd85725e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://murutasugotap.epizy.com/zijolubuxezomezagalokijo.pdfIn PDF document text
    • http://nizowozutagele.atwebpages.com/bams_2nd_year_syllabus_2020_download.pdfIn PDF document text
    • http://vivizegijarugip.epizy.com/bluetooth_device_for_windows_8_free.pdfIn PDF document text
    • http://jejafajiw.rf.gd/91826131587.pdfIn PDF document text
    • http://kutadomirezo.rf.gd/tnpsc_aptitude_questions_in_tamil.pdfIn PDF document text
    • http://gugafusewetesix.epizy.com/41108053320.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_off0000e3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B2 5392 bytes
SHA-256: a7443d0100caee28ecfc7cbbc23baa0b49aaddb4e9ba07384f75f1bd4a71c0f0
font_01_sfnt_off0000f5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F2 10196 bytes
SHA-256: 75a8f6e2dce912118b969082a60d5042739a3ffc7d13ae53f0bfb2e449fb138d

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