Malicious PDF — malware analysis report

Static analysis result for SHA-256 094daf2c6992444f…

MALICIOUS

PDF

93.3 KB Created: 2021-07-14 01:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f1a2534ebf962b69e16d9b1073594d52 SHA-1: 8b7174cb0d97e304e543528d6ce0607fcede74ce SHA-256: 094daf2c6992444fa245fa48e441aae00a4bea48f6197068a8ae98cd880baf4e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://krisoc.ru/uplcv?utm_term=tv+production+jobs+chicago PDF link annotation
    • http://wo-kop.pl/userfiles/file/13235930831.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b4645f7cc19---52148483084.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f67a39ea55---83771224784.pdfIn PDF document text
    • https://emmaushuis.org/pages/fekomemaxisuj.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/4397140dbbc7b6c7ea37558f5caaff75/wajip.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/23093038754.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/rorokedebe.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca8249f36b---xugoneletubidatuv.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/b5ifcrs21j7pujg4ogoqvvl3mv/birowokimogilixidoxubutu.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29736d7253---wefibemajetig.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/3157236301.pdfIn PDF document text
    • https://pasarantogel2.com/contents//files/topalare.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076780dcb8ca---81162015820.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/soberev.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/mg02if3mvipp1fvlbo2k8hguco/8821851352.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160edf18d94510---20216039565.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a477e7eb011---8862118442.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16086ea8723b74---jevaxanakelug.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/tipokabekam.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/nofuguzepegurojipamexelo.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b39277a26cf---rokosorawolojuzaromik.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/zesokuwewezot.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/f6a09af4e4a0a60552a3bb8705706e05/12581988280.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000122b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B1 11012 bytes
SHA-256: 5e14347e63facd79c959b4a641c922748a77026b22c6ec6a28647212f0399b48
font_02_sfnt_off00013bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BC4 17056 bytes
SHA-256: 408169d487c842520f5eb6c13cd546a919625df037d8b8464fd0e726ab359dfd