Malicious PDF — malware analysis report

Static analysis result for SHA-256 07963f2c85c732f3…

MALICIOUS

PDF

81.4 KB Created: 2021-09-16 15:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c5d9bc3c2286f55e5e97f9ec3a7fde35 SHA-1: bcb80f56def80888e404d24bbda577b173251e5f SHA-256: 07963f2c85c732f3ac41d33e70fd4d3e2a1f77f1596a1da332ecc8fda6c94d8b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs that act as a link farm, attempting to redirect users to download various files, including software. The presence of external URIs and the ML classifier's output strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://crewmak.ru/uplcv?utm_term=download+plant+vs+zombie+garden+warfare+android PDF link annotation
    • http://fibertechnique.com/tmp/file/6808425684.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/javezaxikatulu.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/26961587947.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/kejipewuw.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/jizopopewavup.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/polutus.pdfIn PDF document text
    • https://mtestbd.com/assets/uploads/files/xopebotefaxefoju.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/18179390207.pdfIn PDF document text
    • http://eca.or.th/ckfinder/userfiles/files/rabedikafetimagipososo.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5fc10a133---wovuzetakiraro.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/94308953774.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/gaperepegijefanuda.pdfIn PDF document text
    • http://sjzhtchem.com/upload/files/wefilukakogomemamujazo.pdfIn PDF document text
    • http://kawana.tech/userfiles/file/ginujagovenef.pdfIn PDF document text
    • http://keyday.ru/files/files/gasujiduzekijos.pdfIn PDF document text
    • http://www.heksan.com.pl/file/38188367247.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/6dt12h84q1f237hqjptcoj04fc/bevotowafaliwixuvapeku.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/24809838314.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/nikelira.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/47568569184.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/werox.pdfIn PDF document text
    • http://safarang.com/basefile/files/kaxodemoxe.pdfIn PDF document text
    • http://electriccityusa.com/images/fck_uploads/file/bamadufe.pdfIn PDF document text
    • http://kimsanghun.com/upload/userfiles/file/2021941751503809.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/59794152357.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_off0000d8dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DD 17008 bytes
SHA-256: d42351b89e424533216704816027b3e1b249bcc236f138c4be821c97bd01ebc0
font_01_sfnt_off00010573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10573 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8A 11192 bytes
SHA-256: 618330b4b5a2f3ba39e6addec380ca1a00075d713d861a7d83e8962f72fc778c

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