Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dabc48d450693d7…

MALICIOUS

PDF

79.1 KB Created: 2021-09-02 21:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2066809c7317af959eab86b35205b805 SHA-1: 834677ccd02205f65ea47df69e1a771debf547ac SHA-256: 8dabc48d450693d701d6203f5445c4d700e4f703c32153ac7a08df354b5de5b6
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites that appear to be compromised CMS uploads or disposable domains, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The primary purpose seems to be directing users to malicious content, likely phishing pages or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://sgo-bage.com/public/files/files/sikibuvedunujup.pdf In PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/0be601d80ad14c4bcfcf6c6b843c052a/raxabepabolozuberez.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/zetabumo.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dagomatezibuzomuvoni.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/347fen1npgi2m3h6rpvdfctnbj/towojasojejat.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/96883600250.pdfIn PDF document text
    • http://jarosi.hu/files/file/14153631979.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6f0e3eab39---51559091149.pdfIn PDF document text
    • https://wheelmartthailand.com/image/upload/File/41022173150.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/ec440475993a85555331073ce762860c/87278668520.pdfIn PDF document text
    • http://podhoru.cz/userfiles/file/logulixibu.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d528db651---58647012706.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/1881312598.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/garazidiwodaj.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/426521cef0c0de6acb4726eb302c253c/pejijazuwow.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/94408285757.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/lajagupezo.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609860d6dd75b---xugejugovi.pdfIn PDF document text
    • http://dieterheich.de/images/uploads/file/jilupasowixabaxefof.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612abd49cd3a9.pdfIn PDF document text
    • http://walosports.cl/userfiles/file/91715451047.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/85640180600.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d1e3efcd2---muwewugaga.pdfIn PDF document text
    • https://bushregenerators.net/userfiles/files/64673935252.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/xofuzubi.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/50062863241.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/rokekixinakupuzojakut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=mi+querido+viejo+acordes+pdfPDF 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_off0000ccdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDB 19492 bytes
SHA-256: 19630581e13f14a7832dacc5a150ed73b60e6bace2b59898a211bd2a3dc46699
font_01_sfnt_off0000fdea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11601 10800 bytes
SHA-256: 5ed11ea53a34da1c1f6425ac28e823994fd194ef453c103f986db95e9230a29e