Malicious PDF — malware analysis report

Static analysis result for SHA-256 878c9b1dc7af3ce7…

MALICIOUS

PDF

90.0 KB Created: 2021-09-18 06:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 64ecce3702cd3caea1a995ee6b330c70 SHA-1: eea9d46928a021a339a8842075ec7877e92c4967 SHA-256: 878c9b1dc7af3ce7b66ab2e11462f330832b3b8d488a70757c1d57c971155880
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to external sites, suggesting a phishing or redirection scheme. The PDF structure and the presence of external links are consistent with a spearphishing attachment used to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://pixomot.ru/uplcv?utm_term=android+tweaks+root PDF link annotation
    • http://ltptech.vn/uploads/userfiles/file/34020308702.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/13b681910e6243e64f867378adefba45/nikunararaf.pdfIn PDF document text
    • http://yoshitomo-kokubunji.com/jcfiles/file/98431547876.pdfIn PDF document text
    • https://mar3ol.com/Files/files/22348029651.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/norosivejadurarota.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/modaxixe.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410e5e0c1e7---3480198787.pdfIn PDF document text
    • https://altstudio.be/app/webroot/uploads/file/13293454417.pdfIn PDF document text
    • http://ihanzao.com/userfiles/file/20210908082109_1343107965.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/nisimobewa.pdfIn PDF document text
    • https://myvideoclasses.com/ci/userfiles/files/bofavo.pdfIn PDF document text
    • http://e-junghan.com/userData/board/file/lipotobemu.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/16988215773.pdfIn PDF document text
    • http://seowonbattery.com/files/fckeditor/file/1149268336134e29c90fde.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/tuwimalizuvutosugu.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/58135022396.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/37865950982.pdfIn PDF document text
    • http://hamlineparkplaza.com/assets/amund/ckfinder/userfiles/files/piwadapopulafiza.pdfIn PDF document text
    • http://podwierzba.eu/ckfinder/userfiles/files/67992443301.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/xilanagajalunanaruvafifi.pdfIn PDF document text
    • http://nm-union.ru/ckfinder/userfiles/files/wokiv.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_off0000fd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3C 17388 bytes
SHA-256: 3184f594f57f0718209751cdc6e446b81f0c86a0298c1058569279b5a604d400
font_01_sfnt_off00012ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD0 10356 bytes
SHA-256: 672b736127b7339ccc8974fc53f65518782f8c3029d1489a012666b060ba2367
font_02_sfnt_off0001426e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1426E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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