Malicious PDF — malware analysis report

Static analysis result for SHA-256 1402f48854f8b7e8…

MALICIOUS

PDF

81.2 KB Created: 2021-07-15 23:17:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 06794685af47eb41f935ad182ffc6158 SHA-1: a55cbc177587e82f72185ffac38cf6e841c7ee0f SHA-256: 1402f48854f8b7e810c47a4f182332437d9d278ab91ebc49cf16a0f5e8ba083e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, many of which point to compromised websites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure as a link farm is designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://synerhu.ru/uplcv?utm_term=tafts+brew+house PDF link annotation
    • http://www.radio-kum.si/data/files/povunana.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/6ea6lelta8ab8sq3psa5ll9pa8/5192498181.pdfIn PDF document text
    • https://fetogram.com/images/upload/files/42885648348.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160851ff34f501---61393710211.pdfIn PDF document text
    • https://cafepiolho.com/uploads/assets/bivovenogijeg.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/2bcj6vbegfh0e5d1alpn1oknsi/20192097618.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/koxetadufugamapo.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/52862972678.pdfIn PDF document text
    • https://masukpt1.com/contents//files/24960304011.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/6a45f54d498b87cc8d438747373e1f13/muninepegixulomuvovabo.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/ramatoxinexegomibuke.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160756b4f247b3---10645900097.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/60118660370.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/6dc33cb537bc7c9b79587fa77b1393bc/15948341385.pdfIn PDF document text
    • http://jimigubellifoundation.org/clients/f/f9/f96c94eea877db95ad0a8b6fd709b1ed/File/34636503766.pdfIn PDF document text
    • http://thienanglass.vn/upload/files/97976912975.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/wezifesojumivad.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/jf0lav38i44vdiev12ui70ve43/35364934668.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb3fb5d144---9298279214.pdfIn PDF document text
    • https://apskarota.org/userfiles/file/57066486560.pdfIn PDF document text
    • http://bvsaigonbinhduong.com/uploads/files/veraxepodawumi.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/8b48e5cd503864615215213ae7338ce5/84701040241.pdfIn PDF document text
    • https://makanbanyak.net/contents//files/tologodewosiwinifeba.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/37131d272a8df23c4192ff88751b9731/91931501231.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_off0000d9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DF 10360 bytes
SHA-256: 9ae9d66a4a48037993f6960a327110def61c025f589ce3cab3b140e082cbc659
font_01_sfnt_off0000f18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001099e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099E 17480 bytes
SHA-256: 00502e90fe0846d80219e62f1761848b358a20aed92ea3ea379ccb4ceecec21b

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