Malicious PDF — malware analysis report

Static analysis result for SHA-256 500304a9cb07866e…

MALICIOUS

PDF

68.8 KB Created: 2021-09-28 12:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: c576e5258493d6e1ab31bce9a67473ca SHA-1: ff0415b990b2f0f20e81dcdd89a83ff959cf7072 SHA-256: 500304a9cb07866e433aaaa45220489a1d890d5bd4d3fc41e07376d7a317589f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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.
  • 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://coretry.ru/uplcv?utm_term=kickin+it+ricky+weaver PDF link annotation
    • http://portalcom-b2b.es/img/user//file/_0708379001631972580.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/40460693054.pdfIn PDF document text
    • http://sayarbobinaj.com/file/69916330185.pdfIn PDF document text
    • https://futurefacesnyc.com/uploads/file/jagepowitasafemap.pdfIn PDF document text
    • https://wedding-photos.cz/userfiles/file/foresed.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-9-25/20210925040924774964.pdfIn PDF document text
    • http://badgerhillfarm.uk/6985260051.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/161310e45af4e4---mobaxaminotijakidegu.pdfIn PDF document text
    • http://electronicaindex.nl/images/uploads/17554527807.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/52719083306.pdfIn PDF document text
    • http://theffirm.com/userfiles/file/29423076722.pdfIn PDF document text
    • http://abhinavabhishad.org/userfiles/file/wekufovalavi.pdfIn PDF document text
    • https://semangkabiji.com/contents/files/sedigufemumaserim.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/59603829202.pdfIn PDF document text
    • http://glampingcaravan.com/userfiles/file/20210926092201.pdfIn PDF document text
    • http://ekmeta.lt/failai/file/83998666020.pdfIn PDF document text
    • https://fiscconsulting.com/userfiles/file/tikelig.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210916064833.pdfIn PDF document text
    • http://atrsara.ir/resource/files/47334887781.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/ac9fa1ab615782bce7875f9fdf1a7455/xenipotuled.pdfIn PDF document text
    • https://markapin.com/calisma2/files/uploads/37034350623.pdfIn PDF document text
    • http://wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/lumujesidojuguvebuvejet.pdfIn PDF document text
    • http://letdentalab.com/img/files/lelegakizuvox.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/voxafogutanupatinekid.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_off0000b136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB136 14824 bytes
SHA-256: fe6fee7fc2661bb4553c0067153cfe5918bb1cd5af517d2c40fc2cade87c676b
font_01_sfnt_off0000d652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD652 10240 bytes
SHA-256: e46456d4c12aeaecd5591ace2b38a0c2066e99fac52e67716574c85cdeb7529f
font_02_sfnt_off0000ed84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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