Malicious PDF — malware analysis report

Static analysis result for SHA-256 95dfdfe67f795d9f…

MALICIOUS

PDF

73.6 KB Created: 2021-09-19 20:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 40e99bf68c077c56b979963686a08027 SHA-1: c16a3697a3db84fbb1b55b2edcb930e4d1467ccd SHA-256: 95dfdfe67f795d9f591ba262725244aab679870b352dcfd5d86bd91ebf063826
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several heuristics indicating it functions as a link farm hosted on potentially compromised CMS platforms. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://himalayanwanderer.com/himalayan/userfiles/files/takavefodexupogerona.pdf In PDF document text
    • https://mi-stores.com/basketballtotaal/images/editor/file/lebagamixuzakifunidadipoz.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/tobibolikobawo.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161442d02ba1a3---rakurazidejagilosa.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/rakanadewulu.pdfIn PDF document text
    • http://batterseataxi.com/survey/userfiles/files/jumifatadonogezab.pdfIn PDF document text
    • http://ifap.it/images/file/99224190999.pdfIn PDF document text
    • https://efficientinfocomm.com/ckfinder/userfiles/files/40488298020.pdfIn PDF document text
    • https://intrastorg.com/userfiles/file/ratevuratolom.pdfIn PDF document text
    • http://pasaru.com/upload/files/6217802707.pdfIn PDF document text
    • http://orthopaede4you.de/userfiles/file/roburigefisewobixo.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1614163d79b5b7---razerekamegofado.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/8264f22396a7ccd152771946623a8614/jesakonupenijopodirozeli.pdfIn PDF document text
    • https://www.jancsoalapitvany.hu/ckfinder/userfiles/files/labajom.pdfIn PDF document text
    • https://derey.nl/app/webroot/files/userfiles/files/zulujobidakikolafadi.pdfIn PDF document text
    • http://henzefashion.com/userfiles/file/xosigenejafijimesuziro.pdfIn PDF document text
    • http://asztalosweb.hu/userfiles/file/kajogedifutamiberexokubup.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/9f79d9a365dd39e99d373dd49ace11d8/17689006434.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/29713054431.pdfIn PDF document text
    • http://devison-matras.com/upload/file/zosukaniji.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/17310413893.pdfIn PDF document text
    • http://mamtaniketan.com/userfiles/file/41951704786.pdfIn PDF document text
    • http://zenithmetals.com/files/nijunevivirapudoxo.pdfIn PDF document text
    • https://seo-methodes.com/userfiles/file/govubuwisowuluba.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/firewirebot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=crash+bash+3PDF 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_off0000bfc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC3 9956 bytes
SHA-256: 4977aea225a47d5e53818b62738bd45325433c11848ceebc34bcbcef1b74bc5a
font_01_sfnt_off0000d5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E7 16840 bytes
SHA-256: 456940ec1c286c1bce488043ac466adf22fb0c4954d1acaa18ff785113cf010a
font_02_sfnt_off00010142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10142 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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