Malicious PDF — malware analysis report

Static analysis result for SHA-256 91c224e825992042…

MALICIOUS

PDF

78.9 KB Created: 2021-09-06 02:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 11285987c7e64d5d7240377139a45009 SHA-1: cad8af16940e8a6f954fab789b4ea48db8ba6dd2 SHA-256: 91c224e82599204257b17a03aa455a51118fea373bf4647bb1d44c5af6cc3508
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The PDF's structure and link farm characteristics indicate it's likely part of a phishing campaign or a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://asustainable.com/global/file/vumejaz.pdf In PDF document text
    • https://kurishupally.org/userfiles/file/1221747877.pdfIn PDF document text
    • http://goksirlambinowice.pl/img/upload/files/89569621097.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/8ba497977c91be820d3d95e0a2dfc6b3/zaludetape.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/dawogerogalipisibis.pdfIn PDF document text
    • https://tekstilkentrehber.com/upload/ckfinder/files/topadufesuwop.pdfIn PDF document text
    • http://holycrossyouthministryasp.org/clients/f/fa/fa15eac34f6f8ef5a8ada011ffef1578/File/wagaditi.pdfIn PDF document text
    • http://sigep60s-ncbeta.com/clients/44785/File/zuwumozafamegar.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/dusiwikarigef.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/33529400462.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2ce0baddd---mogonijuvetev.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a00489aeb59---60466906566.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160849bf11fbb8---85822186904.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/22323985233.pdfIn PDF document text
    • http://capitalclassof1970.com/clients/e/e7/e78cae7b17622b0161c193cbd63f4fd0/File/nivobilenevolijitenataxa.pdfIn PDF document text
    • http://martonelektro.hu/files/file/zajelerusofotafazedimom.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/gupifumivevo.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/10151119437.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/72113444522.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/96563519061.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16100413f83f02---taxulebi.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160825edfdbb5b---53462426222.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/p1bckj2pukvrtor9qa4okt9fsr/68718304739.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=ibn+khaldun+muqaddimah+pdf+arabicPDF 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_off0000c6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE8 10796 bytes
SHA-256: d3bca524b65e4bef4d444ba30b77d27f84f0534b3f00b5c46008a8dac3448c1f
font_02_sfnt_off0000f6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FD 21408 bytes
SHA-256: d8cd487ff517d7c10a53cf81635fa135da59e80b5bd3a90e8b10da92e6c95248

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