Malicious PDF — malware analysis report

Static analysis result for SHA-256 997a4edcf4199b75…

MALICIOUS

PDF

81.3 KB Created: 2021-09-08 20:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: acf3c3bbdfef7b1e289885c434a94ae1 SHA-1: 87d7aea3ce320d7970c07ebb6cb4649b6aa38cc7 SHA-256: 997a4edcf4199b7540ffdbd19550b566ffe68eb742f87c88aee9ef1000b52662
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, a common technique for executing malicious code. The heuristics also indicate the presence of a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://jrpst.pl/userfiles/file/40434744617.pdf In PDF document text
    • http://855solution.com/htdocs/cljr/data/files/11897254935.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/161355d200f2c2---rumikemikevedogabulolaga.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/9306131998.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/57750447498.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135902a0aca2---38749885422.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/75090838832.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/vasonowizefuvomapi.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/j27d17hptpdpo4t4c6jsip00u7/nutefadiwow.pdfIn PDF document text
    • http://prabashproperties.com/ckfinder/userfiles/files/60994629378.pdfIn PDF document text
    • https://testagenda1.myagenda.cz/pictures/editor/files/fokipumuxe.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/99571070273.pdfIn PDF document text
    • http://tuvanthanhlapcongty.biz/upload/ck/files/vamizaralogeb.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/dakerexijewimul.pdfIn PDF document text
    • http://torremaggiore.sitmap.it/files/files/lokebuxozawafoketojot.pdfIn PDF document text
    • http://galenbio.com/images/upload/file/kesuzatetika.pdfIn PDF document text
    • http://i-p-p-c.com/ckfinder/userfiles/files/9425689609.pdfIn PDF document text
    • http://morpheus-architects.com/file_media/file_image/file/zudul.pdfIn PDF document text
    • http://nghieuphong.com/upload/files/gepuxamowurilipexiris.pdfIn PDF document text
    • https://empezo.xyz/js/ckfinder/userfiles/files/13504604390.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312bebe6b84---xuwiretazerejubinox.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130120cef591---kubidekokutikujexofigika.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/dojadapaterefazofe.pdfIn PDF document text
    • http://ooexperience.be/assets/Image/files/45012883685.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=computer+graphics+javatpoint+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_off0000d78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78E 17692 bytes
SHA-256: f26f74e1b5664f7e1fb7560641ce390c3ead3cec05e61037719c52fa6da86b4c
font_01_sfnt_off00010521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10521 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D38 11348 bytes
SHA-256: ca983449a575fc58abda93f1292d704aad7f0c4014ed64289f1aee41deb0d38f

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