Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b40f974360c2f1…

MALICIOUS

PDF

81.4 KB Created: 2021-08-17 08:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3148a060c7a7fb25bff40069e51fd7bf SHA-1: 48a88362f83e07724a7a3a5b989a93c960f6c5dd SHA-256: 40b40f974360c2f1d16bd9fbeebe80336a11d8b07d325a4b2c0d78db77000747
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded URLs strongly indicate a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://crewmak.ru/uplcv?utm_term=financial+statement+analysis+subramanyam+ppt+chapter+1 PDF link annotation
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/08042d8c5d96478255d2fe11db611d99/similu.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/4fc0ee016dcc9e353aed7227921433ff/pekekojezisigigal.pdfIn PDF document text
    • http://boatmonies.com/uploads/files/sokotugizulifaxadilawi.pdfIn PDF document text
    • http://veivel.com/userfiles/file/renenubinisonurenidozeli.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/42634322286.pdfIn PDF document text
    • http://eca.or.th/ckfinder/userfiles/files/rajexaful.pdfIn PDF document text
    • http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/pasejodofodavupazesudile.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106920e4389d---64489657437.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b451409aec1---wowawuzavemafotinojivig.pdfIn PDF document text
    • http://dragonspond.com/uploads/files/ximokunog.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/rivuxomomebu.pdfIn PDF document text
    • https://jsptti.com/ckeditor/ckfinder/userfiles/files/46018805775.pdfIn PDF document text
    • https://www.privathospitaletkollund.com/ckfinder/userfiles/files/xajipelobolopinepive.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/polojuwepefez.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ef5d1ab32---jorabaf.pdfIn PDF document text
    • http://ng-sons.com/userfiles/file/tadotulebidelof.pdfIn PDF document text
    • https://md-bud.pl/szklo/photos/file/44764428332.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076656399a1a---visaper.pdfIn PDF document text
    • http://texmet.pl/userimages/file/vipop.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c3243dcc0---12950603320.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087448500346---67365496520.pdfIn PDF document text
    • http://euro-ex.com/images/blog//file/kusetisodegijigofuxefalo.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c1714ef36b8---viruvifokoxidosuzenewiguk.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16077d2546f2f3---joralizujumasafigogo.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_off0000daaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C1 16588 bytes
SHA-256: 8e2c49d59e7ae48f304e143bf166049e3ea7e51c7b3c7bc08d06bb2cb5fa8fa3
font_02_sfnt_off00011def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DEF 10900 bytes
SHA-256: f75259f1f9d32d3bef9e762204a920168ea3a003a4d3bff7f9bfb0cc0b66888e

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