Malicious PDF — malware analysis report

Static analysis result for SHA-256 7577c4116772a89a…

MALICIOUS

PDF

78.2 KB Created: 2021-09-03 03:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fc7929c1472529614fe65377a73a86da SHA-1: 1fed577173551a3bc76be19dc04bbc2ac2fc9f42 SHA-256: 7577c4116772a89a917c1f9ee38666356bd18465879dcadfb2d80f5b73e054d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The embedded URLs and the nature of the heuristics indicate an attempt to lure users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://proektasis.gr/admin/spaw2/uploads/files/44865825146.pdf In PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210704153431.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/kisedeluxibekiwan.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/8c8b0038e2961c7f11278cea8fbcdc92/42787115677.pdfIn PDF document text
    • http://shreejians.com/userfiles/file/26253079683.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021724129113167.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/fevuwem.pdfIn PDF document text
    • http://topas.lt/userfiles/file/74524330366.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa94fa19b4---xuromamizusunoxipuw.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/4900388314.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/91591110844.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/21293584765.pdfIn PDF document text
    • http://supragyn.cz/userfiles/file/fowofebakilalevurukavo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d59706ca50---43903191175.pdfIn PDF document text
    • https://cristalensi.com/public/File/zepadukepone.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/58645886142.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16121553169ccb---mexomewijabulevasobev.pdfIn PDF document text
    • https://computerzone.pk/file/topamufemidojowor.pdfIn PDF document text
    • http://screen.by/images/file/walaju.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/28819882224.pdfIn PDF document text
    • https://trunglamdecor.com/uploads/userfiles/file/2000814081.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16082468bddd1c---vuxumol.pdfIn PDF document text
    • http://hzaidele.com/images/upload/File/36778491524.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/qu43rrc5dto40i88d380giaih4/82297169886.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=document+list+for+gst+registration+pdfPDF link annotation
    • 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_off0000cc76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC76 17472 bytes
SHA-256: a5ee123ec4ce8cb9e271563ec64749b136e16f686b579b81570e4eae6c029928
font_01_sfnt_off0000f959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF959 11064 bytes
SHA-256: 128ae73bd59e35df81d6f5ca46904c523ef40daa9e775b2c520dffd6d7618ce9
font_02_sfnt_off000112e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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