Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2f32eaef49fdaef…

MALICIOUS

PDF

91.8 KB Created: 2021-10-09 01:24:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8bddfecda74685cf5fb2c6a3a80e881f SHA-1: 1b425d2ac3507a69f9ed7099d8e38b16bbc2e938 SHA-256: e2f32eaef49fdaef6eec215a286d45af1963770231c28a608bc2d6035f7ef52b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains a link farm pointing to various websites, likely for credential harvesting or malware distribution. The presence of embedded URLs and the nature of the heuristics suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://cructi.ru/uplcv?utm_term=spoilage+of+fruits+and+vegetables+pdf PDF link annotation
    • http://aescantabria.es/upload/fckeditor/file///96975185073.pdfIn PDF document text
    • http://wamer.org/userfiles/file/puwevotujowuvukokoroluf.pdfIn PDF document text
    • http://zatuchlina.cz/upload/file/junexenawanepano.pdfIn PDF document text
    • http://asesoriazabalburu.org/azaba/files/file/37926056410.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/jekuwuvoveje.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615642a354523---dugesevilinekobanedokuvix.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614092482f0d7---roxibogebatizogalumijok.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021100418493544.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/v2pc9q337lurhpk7n68sodhnm0/68832920274.pdfIn PDF document text
    • http://osstemcardiotec.com/files/fckeditor/file/654203189613ff8e1eddba.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/darawibositone.pdfIn PDF document text
    • https://whitesal.com/data/images/file/1985_20210914112036.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/2c11b81e75d127ca90da0bd00bb24b8b/fivowesor.pdfIn PDF document text
    • http://strap.sk/uploads/file/89513429356.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/82278654922.pdfIn PDF document text
    • https://kopari.hu/files/file/ruwodoguviwiworiliwo.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user//file/_0190127001632830283.pdfIn PDF document text
    • http://apicn.net/upload/files/54518969374.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-20/20210920205808141097.pdfIn PDF document text
    • https://pharma-tools.pl/galeria/file/46914577136.pdfIn PDF document text
    • http://kantipursecurity.com/userfiles/file/dujuzokosopetuvutobo.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16160a8e859c0b---towuwibumafimanemawav.pdfIn PDF document text
    • https://jin-ji.com/upload/files/67414306910.pdfIn PDF document text
    • https://agmatbaa.com/upload/files/50034436672.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_off0000fb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB06 20268 bytes
SHA-256: 17d3130c3f68c84583839b59ddc8f97d6e3e5826dda926111adbfedc52a22bcc
font_01_sfnt_off00012fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC6 11052 bytes
SHA-256: 636e24512898e35097b70166d5ccb5004356e1d98a8606f211dfcc6ec360488e
font_02_sfnt_off0001493b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1493B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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