Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee8810e00eff507…

MALICIOUS

PDF

79.8 KB Created: 2021-09-04 23:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5aa5cf1951588ef2737531dba15fa817 SHA-1: 6b1132047a108ba6070e20957b1fe0ca89831689 SHA-256: 0ee8810e00eff507f489587e03f967ca7bb9356094d0e54dcc194039d90cd04f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://longvu.vn/Images_upload/files/zerivuruvituxedopedimegu.pdf In PDF document text
    • http://www.chatanakonci.cz/userfiles/file/bekisifalunegar.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/e4388b4a02d978d68a00b2369d918e03/55572055506.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/bb3253dbedd9e1792503de5c0ef03a12/37999145400.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/dc20c663362770dc3ba77c28eee1e627/zetawoxe.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/330a26b8f27af3be99fc4813523084c9/22705736359.pdfIn PDF document text
    • http://techbis.pl/files/file/99842303222.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/gifpmu7ndnihjmn8b721halad1/59001879385.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/96288171562.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/b142aeb66478a8589ea08e20a71f0e82/donidivowenijevupameloxa.pdfIn PDF document text
    • http://daisin1977.com/js/upload/files/bavevesef.pdfIn PDF document text
    • https://dietacud.eu/upload/file/lixilulegetu.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/53669769989.pdfIn PDF document text
    • http://bocghedanang.com/media/ftp/file/59694830516.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16094870725109---fitutikude.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/53326276538.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2efc3a397---ginogoxaxabizibabinib.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/meravulemutuw.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/1902160062.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730377690ba---kokaxejatofelad.pdfIn PDF document text
    • http://casms.org/atts/news-files/file/jalexepugu.pdfIn PDF document text
    • https://www.uflo.edu.ar/ckfinder/archivos/documentos/xuvudedijijivaduwagozeli.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/5271798000.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/tuwafotexutisasanot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=convert+pdf+en+word+online+gratuitPDF 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_off0000d3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A7 10788 bytes
SHA-256: 18d8ef9d8ff368167758e06394795f34d0269a01f89593454cb7582d75c7654e
font_01_sfnt_off0000ec7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7D 17248 bytes
SHA-256: 34cd9677df61e2ec1db2b054b3333b145fa664215665096cf5104bb235461a3d
font_02_sfnt_off00011952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11952 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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