Malicious PDF — malware analysis report

Static analysis result for SHA-256 1722dba7198b65f0…

MALICIOUS

PDF

76.8 KB Created: 2021-09-04 15:31:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 267c237adf7584928072b7db6cdf1ed6 SHA-1: d446811c0ad099f249ddfed2f646316070fcf4f7 SHA-256: 1722dba7198b65f08a60a16ef748f10b928f6cd048f5168cea85500d53ba818d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://royal-pizza.eu/files/file/gowekopozajowibotovit.pdf In PDF document text
    • https://dalilak1.com/userfiles/file/58872933678.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/26324717627.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/ooa12cch9njsvacu33etl0q48r/rovozilidukalaxum.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/timekitej.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610e69ed3c63f---87337900103.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/luwodozewafido.pdfIn PDF document text
    • http://88cpap.com/userfiles/files/76320429847.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/n9u3k6tjl27903qr5vdopv2t06/keluwade.pdfIn PDF document text
    • http://olynskiconstruction.com/pics/file/tunejilibatosarogum.pdfIn PDF document text
    • https://signika.pl/Upload/file/jepasusabevunugasu.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/xonefejilolemivirafij.pdfIn PDF document text
    • https://austarpharma.com/upload/files/59600497640.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/739d4564f4084d6d41f9363ee8e996ab/54718175466.pdfIn PDF document text
    • https://goez1.com/10005001208290177/ckfinder/userfiles/files/67397924824.pdfIn PDF document text
    • https://riminabda.sk/userfiles/file/tixemulefagi.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/wonekokotofaxatozam.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608734b0adddf---82980046425.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/ab3564ccaf2854cc82f23c9353e81db5/36991692028.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16075bb8d9a09f---11310528225.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/nubejiwen.pdfIn PDF document text
    • http://moristas.com/userfiles/files/podokixeda.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/dbcecb030c82e390d376e39c1d4bd022/26401918743.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=protesis+ortesis+y+ayudas+tecnicas+zambudio+pdf+gratisPDF 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_off0000c23f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC23F 11332 bytes
SHA-256: 3590d2cf1463c9f1678b8788eba962566aece870de0ce498eff4ff48864c09ac
font_01_sfnt_off0000dc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC93 18216 bytes
SHA-256: 043916d711638d6bb3b6b6b1f0d93d34f2e3317b12ba92e685d64ceb82544f72
font_02_sfnt_off00010b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1