Malicious PDF — malware analysis report

Static analysis result for SHA-256 e188d8346487ef08…

MALICIOUS

PDF

68.1 KB Created: 2021-09-25 10:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 4738630d116d15fd10d8c902d497aa28 SHA-1: 9655bfdf048262c8e8ce9809a5a394161da55530 SHA-256: e188d8346487ef0837ed3875e11648ce467902aaacc8d380957cf313ffca285d
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 0.9973

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://ketchas.ru/uplcv?utm_term=no+night+is+too+long+full+movie+online+free PDF link annotation
    • http://lnv-cnc.gr/userfiles/file/nunotojesigapudifikimode.pdfIn PDF document text
    • https://collinite.pl/userfiles/file/lopinosivatuwojo.pdfIn PDF document text
    • http://ad.ditroinfotech.com/laportal/ckeditor-ckfinder-integration/uploads/files/ragofose.pdfIn PDF document text
    • https://laser123.com/geektic/files/ririxakifolugonukobakujug.pdfIn PDF document text
    • http://anshan56.cn/userfiles/file/1631736534813701887.pdfIn PDF document text
    • http://xn--hy1bt45apoap01a.net/jangheung/userfiles/file/xojowoduxidowazugotuvof.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/161439c71cc710---risevimotag.pdfIn PDF document text
    • https://wasael.com/userfiles/file/fefoneme.pdfIn PDF document text
    • https://rumahbaruku.com/contents/files/wamenesoratofomikakenunem.pdfIn PDF document text
    • http://agarimo.com/archivos/archivos/75816530322.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/jitixapixepakuwuliredom.pdfIn PDF document text
    • http://annuaire-regional.com/ckfinder/userfiles/files/vojanoxopirizujekijeju.pdfIn PDF document text
    • http://skene.es/userfiles/file/petuvef.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/15d355f18e46dff51062e1cb7b674111/wifemagigurivufovote.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/jibekagaxenejotitib.pdfIn PDF document text
    • https://jfava.gemwareserp.com/userfiles/file/vawos.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/28690047695.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/42662218457.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/40019127050.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/gikax.pdfIn PDF document text
    • http://yoga-privates.com/yoga-privates/file/kafurarogetomobodudapo.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_off0000ab89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB89 10640 bytes
SHA-256: 08519f8d551931762a2f20e8f52387b4c7d8fd68c6fb2c84c065fda2b53734d0
font_01_sfnt_off0000c3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dbcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCC 14768 bytes
SHA-256: 905f7a5e2f0a98f24dc2775ff85857319f62b9b8b7deb89a7f5ae688dfa5ba2f

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