Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a25d5a7757e82c…

MALICIOUS

PDF

81.6 KB Created: 2021-09-19 01:35:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 4f5eb9e73d8f1275bf14e7ab9a9a3611 SHA-1: aef9860e691769658e6c31ab20054fae2c2ade2c SHA-256: 00a25d5a7757e82ce819afd0ec8d541600d6cbf330f5fd163efe8d2735884e7f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that form a link farm, directing users to various domains, some of which appear to be compromised WordPress sites. The document's structure and the presence of external URIs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://inwebjor.ru/uplcv?utm_term=qr+code+for+iphone+11 PDF link annotation
    • http://amblesidewindermere.ca/fckuploads/images/file/puzafotuleledubelapureban.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a153e107ff---38827937388.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/49272278970.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16142388eca133---18051744662.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/bujed.pdfIn PDF document text
    • https://cevhertemizlik.com/userfiles/files/43498200028.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/70084967082.pdfIn PDF document text
    • https://adtw1.elfjane.com/ckfinder/userfiles/files/zikejajupilimebidajabax.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/ladadadoxej.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161451abbebf93---tevavinegolifixog.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f48eef23de---50194263796.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/49908045241.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/17532762546.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/rusowewelisirolulus.pdfIn PDF document text
    • https://pracowniatechart.pl/fckpliki/file/25050745165.pdfIn PDF document text
    • https://polandpools.com/contents/files/76551909131.pdfIn PDF document text
    • https://ms01bet.com/contents/files/valab.pdfIn PDF document text
    • https://pro-biomed.com/admin/userfiles/file/pexuvo.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/4394483883.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/bc2534e84fb635054957f08226b56215/nufisukidovawinuxibunoga.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/70918586338.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/sesajitajibotojoma.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_off0000dd57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56E 10356 bytes
SHA-256: 30eca549e38a6d8c01f86147ff0c3f89a3543ec4f64e371ce0c417b26038b083
font_02_sfnt_off00010cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC1 17112 bytes
SHA-256: 370c0c0611e9b8e7d223fc0aa73f18463df5b3684c7a7b3ca199aefd712f530d

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