Malicious PDF — malware analysis report

Static analysis result for SHA-256 c386e35b121df415…

MALICIOUS

PDF

74.2 KB Created: 2021-09-15 23:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ddd64b55e3af05e43f19c7af5e4b764f SHA-1: 5fb0b3cee3afc79fd6b1d71eb0ddb431f96614cd SHA-256: c386e35b121df415ad823d7cf078b316389ae04f5ba755c32481bc501e0665c5
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-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://cructi.ru/uplcv?utm_term=nagito+danganronpa+2 PDF link annotation
    • http://ohadalegistrocbarter.com/ckeditor/uploads/files/zomuzukarawuw.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/kusafevanudevowizav.pdfIn PDF document text
    • https://libertyrealestate.in/ckfinder/userfiles/files/vuzowanivolenalabip.pdfIn PDF document text
    • http://salocchi.it/userfiles/files/nenobaraxanowakotew.pdfIn PDF document text
    • https://rolcsi-bau.hu/userfiles/files/52867300588.pdfIn PDF document text
    • https://fultoys.com/userfiles/xejigalovemusalevepi.pdfIn PDF document text
    • https://bccphil.paramedix.biz/uploadfiles/file/21543351116.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a97e3a0693---29769557165.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/27912074844.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/rafimewuwojinifapap.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/16131420741.pdfIn PDF document text
    • http://metallpress.ru/files/pawijijikilojulodufuf.pdfIn PDF document text
    • http://darstin.com/userfiles/files/falawajekewo.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/59952737722.pdfIn PDF document text
    • http://headrepublic.pl/images/files/54139398053.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/f0e517af5e716e4d8f9332b531526d10/pawefamagafapukijos.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/43085528431.pdfIn PDF document text
    • http://senvietsystem.com/ckeditor/upload/files/bawusawokuwokonos.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/virivalotumodadepi.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/zutosekerajananezesodojex.pdfIn PDF document text
    • http://packturf.fr/files/60713513994.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/8406995547.pdfIn PDF document text
    • http://nazycakes.com/userfiles/file/15739967767.pdfIn PDF document text
    • http://www.sushmitamukherjee.com/fckimages/file/46939998720.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210901121625761.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB74F 20204 bytes
SHA-256: fce286234ad054ca1e9f445e4c3ab12ed10755cf9064c0cddad9db52c1738d22
font_01_sfnt_off0000ebca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E1 10316 bytes
SHA-256: 2e9981a6fd6401e94617b4c5f6970f41fdf734b7ed1b7573417b61775920900b

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