Malicious PDF — malware analysis report

Static analysis result for SHA-256 a383042406c0fa86…

MALICIOUS

PDF

87.2 KB Created: 2021-06-28 05:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b6a8c22e7ae9b51d407ede2c2817c102 SHA-1: 52228913044ff40fad1a61a2e91f9acec1bd1ae2 SHA-256: a383042406c0fa866822ff506d71f38f58939242a81a46baee8e74685b962918
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to compromised WordPress sites, 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 a common tactic for redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://medvor.ru/uplcv?utm_term=rage+into+the+dying+of+the+light+meaning PDF link annotation
    • https://audreyheselmans.com/_files/file/gilobanewipavuxizud.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/ca0fe57af13171a26f83066acd789f08/99622146495.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/f9e57e6d6af9bdade0872fa20b3bdf09/37972527440.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-6-25/20210625014855860975.pdfIn PDF document text
    • https://oliogalanis.com/file/98742896492.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/legazuk.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/20b8db822fc20696e61088a407403352/fabosolevutuwag.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7a74e56b9---53872245861.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/dbe141a7e426f664e7f710548910414e/51091731272.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/sofesowajepuzorezori.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/4163335027.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/xuwamusimixew.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/lulebuvijuzinalilef.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/826c6bbf8fabf0fcb0295bb5398811d5/12870161264.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/9cf0775ad3684fa395cf4f5ebaece3b5/bufipivemoj.pdfIn PDF document text
    • http://businessvaluationapp.com//fck_files/file/pajeko.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160910a1371564---391928473.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/duwogoxidijokobax.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/bg4a6ocjtg6gem402tq5isgesc/boxub.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/gazewadusaberanomi.pdfIn PDF document text
    • https://actor-conseil.com/files/file/maxuzevilebujixufubetiba.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_off0000f316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF316 17268 bytes
SHA-256: 26edd866edd370c11c63381c61ff985b167bb91aabe9a7f5dafe2c194abcb5fd
font_01_sfnt_off00011f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F92 10692 bytes
SHA-256: 0c217b4b85055a5711def08dda2d27e1ee283c0cb9ac955733aa3061d63ddce8
font_02_sfnt_off000137ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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