Malicious PDF — malware analysis report

Static analysis result for SHA-256 8982f576d5cb5f50…

MALICIOUS

PDF

79.6 KB Created: 2021-09-28 05:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9d1c9f5364c7e17099441df6f1df6e39 SHA-1: 6b566cff72074530c1f36008277219cd9d4aa271 SHA-256: 8982f576d5cb5f506de07b795d06ae54e0b8db9ab2471970d87cabe1a3c92367
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URLs, many of which are hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://medvor.ru/uplcv?utm_term=postdelayed+in+kotlin PDF link annotation
    • http://chinawin-consult.com/userfiles/kutepi.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/69641977124.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/32636120082.pdfIn PDF document text
    • https://nakipoglugroup.com/upload/ckfinder/files/dubavejogolukovuru.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614b62a5b4e9a---31117100209.pdfIn PDF document text
    • https://computerzone.pk/file/51071707829.pdfIn PDF document text
    • https://samsungklimamodelleri.com/upload/ckfinder/files/figezumenarigoxe.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/82235881791.pdfIn PDF document text
    • https://vnjhanoi.com/upload/files/padunovubetura.pdfIn PDF document text
    • http://aokunoil.com/ckfinder/userfiles/files/37349733050.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/xazimorakopibokib.pdfIn PDF document text
    • http://parentini.it/userfiles/files/43318227432.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/16547143800.pdfIn PDF document text
    • http://saigonford3s.com/uploads/2021-09-14/images/files/siboxa.pdfIn PDF document text
    • http://elitacasa.it/images/file/32665567493.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/89100117288.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-22/20210922200606271918.pdfIn PDF document text
    • http://studiodugnani.it/userfiles/files/99337135558.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613f95db4c094---xoziwilesakuwivado.pdfIn PDF document text
    • http://seghers.kr/data/editor/file/293365740615250d164cd6.pdfIn PDF document text
    • http://4bx.pl/public/file/14072743850.pdfIn PDF document text
    • http://houselandia.ru/files/fubimapitelilibikaveremo.pdfIn PDF document text
    • https://mandarinkinesiska.com/userfiles/file/970726332.pdfIn PDF document text
    • https://fu-ko-property-agency.com/webroot/editor-uploads/files/mavexalafoxubuzesifa.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ceca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECA 20644 bytes
SHA-256: a2c6f9104a71cae06af3ea0b4d1da89d1f5b38ae8248b34946c98a220b8d80c9
font_02_sfnt_off000102b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B9 16244 bytes
SHA-256: fddcbe21bdf9fb2753729b4ab5b26d7a3fbb01e3fe51d41ab0725360e25c189d
font_03_sfnt_off000118a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A8 10348 bytes
SHA-256: 09d488e317be95abc6a7578a489ebe905352bbd5dd19ad39a813862b29c2bf87

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