Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce7a99859d51ab3…

MALICIOUS

PDF

70.5 KB Created: 2021-09-24 09:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f1dcaf025f5d9626d25bb92a3575df6b SHA-1: fde79a031effa33aee2a0df0786e3a79a0a866a5 SHA-256: bce7a99859d51ab31e2fd5a4013844456f2bca498d3c2fd052bd40d90b77e2ff
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document, likely leveraging embedded JavaScript for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://philabc.ru/uplcv?utm_term=pubg+minimum+requirements+android PDF link annotation
    • https://www.sesc-am.com.br/Selecao/ckfinder/files/piwapat.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/xufunivo.pdfIn PDF document text
    • https://ncltandatbar.com/home/ncltandat/public_html/dowalumniusa/ckfinder/userfiles/files/tavaxipunu.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/xorukoburisedelazu.pdfIn PDF document text
    • https://atiksigorta.com/files/livexux.pdfIn PDF document text
    • http://tianlanip.com/filespath/files/20210903065553.pdfIn PDF document text
    • http://citra.cl/userfiles/file/vavagibolufem.pdfIn PDF document text
    • https://net-mex.hu/ckfinder/userfiles/files/vadovunuki.pdfIn PDF document text
    • https://everestart.com/images/stories/file/54851833118.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/111994748.pdfIn PDF document text
    • https://fu-ko-property-agency.com/webroot/editor-uploads/files/donikomamefene.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/degebaseribotafavop.pdfIn PDF document text
    • http://bakersfield.thepokeluau.com/uploads/files/rinatonifawomabaweb.pdfIn PDF document text
    • https://kimansion.com/uploads/file/sunerumad.pdfIn PDF document text
    • https://edgecs.com/documents/30747359370.pdfIn PDF document text
    • http://snft.ro/media/file/getomanewumelavukubesewov.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/lufuvepuxekaniku.pdfIn PDF document text
    • https://takitech.hu/userfiles/file/25196574478.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/8234069217.pdfIn PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/losipitelapopagikojuduwip.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/g4lo0tfemriulcr5gtjct0gjs2/rudabedu.pdfIn PDF document text
    • https://myarchitect.es/ckfinder/userfiles/files/73082691038.pdfIn PDF document text
    • http://heizler.hu/files/file/50502428798.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_off0000b3b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B3 10932 bytes
SHA-256: cc2b5054dfca7e68d7214989b9615a819ae99a95c3fd187909d77b016d60b655
font_01_sfnt_off0000cc77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC77 15552 bytes
SHA-256: 73da5fe126ef01ccf61b1bd2910802d99f40682620af3d8081eb02d2e56cf014
font_02_sfnt_off0000f3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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