Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6cab1774890eacc…

MALICIOUS

PDF

102.7 KB Created: 2021-09-10 03:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: c32f26fad6bdc82f35d87549f29a4924 SHA-1: af46086d2728d8476895d3583edc7e786535cbf2 SHA-256: e6cab1774890eacc23034d7edc4b63919aae1db20e757a9adcb5520792cc6035
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 0.9966

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://garglob.ru/uplcv?utm_term=semantic+ui+search+dropdown PDF link annotation
    • https://perfectsextherapy.com/public_html/userfiles/file/sesitizuvula.pdfIn PDF document text
    • http://parfumland.sk/upl/bezuwuwisena.pdfIn PDF document text
    • http://investgeorgia.ge/userfiles/file/7048037058.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/dakuxerajav.pdfIn PDF document text
    • http://ladna.pl/user_images/file/16316926911.pdfIn PDF document text
    • https://chungangroup.com/uploads/files/202109080127213445.pdfIn PDF document text
    • https://digireg.cz/upload/56465001818.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/90977901539.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16132a0dc4cfc9---vajarasikupemux.pdfIn PDF document text
    • http://b40555.handyfriendship.com/upload/files/14750373229.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/jubozikofelidova.pdfIn PDF document text
    • https://stabiactiv.com/userfiles/file/80202316529.pdfIn PDF document text
    • http://www.tahitotfaluovodak.hu/ckfinder/userfiles/files/72138040607.pdfIn PDF document text
    • http://xn--jt2b56wn0ap2a.com/upload/file/202109052201274298.pdfIn PDF document text
    • http://konikanarrowfab.com/ckfinder/userfiles/files/nijapoledawaludomel.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/96210968335.pdfIn PDF document text
    • http://knx-shop.ru/admin/ckfinder/userfiles/files/50711393019.pdfIn PDF document text
    • https://sagarexpress.com/userfiles/file/70854495956.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/sovometudomafufonunosete.pdfIn PDF document text
    • http://zdravi-kromeriz.cz/files/file/43186200968.pdfIn PDF document text
    • https://888nv.ru/userfiles/file/3088873557.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/xejijatojew.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/43971247181.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_off000129a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A5 19020 bytes
SHA-256: 1904182a236666efc4e3f489c6ca2f5f7dcee71f75cfb75d582ef2f3859bfcbb
font_01_sfnt_off00015be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BE0 10996 bytes
SHA-256: 6cfcbeb55804559e51fa8b401a8ebc5aee948613a34e28931f615a2f003dc129
font_02_sfnt_off00017549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17549 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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