Malicious PDF — malware analysis report

Static analysis result for SHA-256 25cada485fe53f64…

MALICIOUS

PDF

80.1 KB Created: 2021-09-19 13:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 74825baa993d7fce0f7e23c3a0075b75 SHA-1: a3898b014f4da5f3297ad295b6abdbf4fd60987f SHA-256: 25cada485fe53f643f5a28cacfdc62fa2b1390bea7fbaf20cbb6b4952a85e756
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with high confidence. It contains embedded JavaScript and a large number of external URLs, many of which are hosted on disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded JavaScript indicates an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=queen+movie+online+free PDF link annotation
    • https://menu2uplus.com/images/file/74039872119.pdfIn PDF document text
    • https://securitydm.eu/slicice/file/pejuj.pdfIn PDF document text
    • http://ducthanggroup.com/webroot/img/files/88032608700.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/nakidozoloxo.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/30672379647.pdfIn PDF document text
    • http://regmac.net/userfiles/files/238363586.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/77559213487.pdfIn PDF document text
    • http://vnndt.com/Images_upload/files/wodalob.pdfIn PDF document text
    • http://risme.vn/files/99177952463.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/1879253168613e5e03414ca.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/82726907804.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/26956817727.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/paxukozetodixin.pdfIn PDF document text
    • https://natatourism.com/userfiles/files/83937720637.pdfIn PDF document text
    • https://csmgh.net/pevron/www/img/file/lajuzutewun.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/bonetimaxufof.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/202199203633404.pdfIn PDF document text
    • https://moiatakashta.com/userfiles/file/77514995040.pdfIn PDF document text
    • http://tolltisztitas.eu/userfiles/files/xuriwaponuxunepevejagopot.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/38692486167.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/relizusatu.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/18929228778.pdfIn PDF document text
    • https://fiscconsulting.com/userfiles/file/dopir.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/revesopej.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_off0000d7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F0 17272 bytes
SHA-256: e1a2f735f18bcc106a4ba22953fc7a5d259f980d763701981dac84ece2ab8452
font_01_sfnt_off00010414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10414 10172 bytes
SHA-256: 4d3995273d268ed151f17440902d44a870e1f2eed6e620b226ea03dd8ae58715
font_02_sfnt_off00011ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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