Malicious PDF — malware analysis report

Static analysis result for SHA-256 13c8cf2327f5362f…

MALICIOUS

PDF

100.2 KB Created: 2021-09-21 17:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c1d9efc47385ed5f21dd6c446d0cfddf SHA-1: 266fe0e3316bd7f3c214830f64ae75faff840609 SHA-256: 13c8cf2327f5362fc139e9a1e4598ba7e4b18e8559721f986d6f2442f59e2b98
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://pixomot.ru/uplcv?utm_term=alice+in+wonderland+summary+short PDF link annotation
    • http://vinhhangvien.com/upload/files/20706777490.pdfIn PDF document text
    • https://www.leadercaravans.com.au/application/third_party/ckfinder/userfiles/files/vajokibefagituxopix.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/nadirezunirosazipadexoma.pdfIn PDF document text
    • https://ceramicasvillaflor.cl/UserFiles/File/wemugazomariw.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/59799205289.pdfIn PDF document text
    • https://www.bussmann-tiefbau.de/ckfinder/userfiles/files/44564619464.pdfIn PDF document text
    • https://eghamatsafar.ir/basefile/eghamatsafar/files/ruxomafujexevonivize.pdfIn PDF document text
    • https://equimat-cheval.fr/file/47068456166.pdfIn PDF document text
    • https://htijsr.com/userfiles/file/betezixuje.pdfIn PDF document text
    • http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/38524809804.pdfIn PDF document text
    • http://huynhgiabaohotel.com/uploads/FCK/file/zotokikozaxubasafeno.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/zirasepejafuf.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16143432970cff---xaxexipetuzez.pdfIn PDF document text
    • http://hzeiger.com/userfiles/file/navone.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/10681311189.pdfIn PDF document text
    • https://s-oil.hoakhanh.vn/uploads/image/files/fefugalo.pdfIn PDF document text
    • http://bjavc.com/filespath/files/20210920211009.pdfIn PDF document text
    • http://globalsublimation.net/uploadfile/files/wuzolobezazofabudij.pdfIn PDF document text
    • http://vidol.eu/userfiles/file/dififuxeno.pdfIn PDF document text
    • http://cdenito.net/userfiles/file/95433552442.pdfIn PDF document text
    • http://coumert.com/images/file/jenufa.pdfIn PDF document text
    • http://chipmax.in/chipmax/ckfinder/userfiles/files/pimiwugune.pdfIn PDF document text
    • http://ned.ru/uploads/files/gotadexet.pdfIn PDF document text
    • https://cakamuzejs.riga.lv/ckfinder/userfiles/files/zopifaxabewijuwatofenom.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000121d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D4 10916 bytes
SHA-256: ebe5a59e28366cac39982aa41186ad2201ea1cf184e8f4ec3060c2ebc90a3b8c
font_01_sfnt_off00013b06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B06 18608 bytes
SHA-256: ab38422483b076826cd41be7bd5303ec7194321b803bf2e7e201237c648caa22
font_02_sfnt_off00016ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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