Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a72a6257fd30242…

MALICIOUS

PDF

72.0 KB Created: 2021-09-27 11:37:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 31a60959ca585672b3a819842fb28d49 SHA-1: 94c584374b6c51bf8e13f0e488ad2aeb5db41f94 SHA-256: 5a72a6257fd302426d27e7937309892a65c382ea0ed60d99313ba14725ded5a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as a phishing trojan and ML classifiers indicated maliciousness. It contains a link farm with numerous URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting an attempt to obscure the final destination. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing lures designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/11444789455.pdf In PDF document text
    • http://bckbytow.naszbip.pl/img/upload/files/87952220000.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/pazedomojutitesotik.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/59398723241.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/66698527583.pdfIn PDF document text
    • https://wanna-drive.nl/files/File/18945503038.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/lanagebulivijigero.pdfIn PDF document text
    • https://eagle-aviation.com/userfiles/files/xekuwo.pdfIn PDF document text
    • https://hung168.tw/UserFiles/files/43441025746.pdfIn PDF document text
    • https://ijfbacknumber.com/editor_up/30697916810.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144f95fb71f5---2265892161.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/50241410536.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/mimapi.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210923193427.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/49553851234.pdfIn PDF document text
    • http://fredericjean.net/oplusco/file/87115475097.pdfIn PDF document text
    • http://kliknetezde.cz/admin/obrazky/file/xibit.pdfIn PDF document text
    • http://king-tableware.com/uploads/files/202109081229125072.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c00722009d---76392232830.pdfIn PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/wopepizux.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/d2b6dd7596efb5313c5cfa26ec138c6d/33029543667.pdfIn PDF document text
    • https://tecnomatec.cl/upload/file/7968534979.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/sigasenopuloro.pdfIn PDF document text
    • http://metabolit.ru/files/file/44189886143.pdfIn PDF document text
    • http://alanurturizm.com/rsm/files/kenetekix.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132265dab1dc---dixabovunujupedarofeluviz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=chal+mera+putt+2+full+movie+free+download+720pPDF 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_off0000b396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB396 17268 bytes
SHA-256: b0df9b9716a060d803749f34a28e15934712a3356b3200e9457624bc516b814c
font_01_sfnt_off0000e03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03D 11172 bytes
SHA-256: 91fb863362c2bee2070a8f64bd0ab0c8abcedef4e35cd1d5ff327ed6f2e16d22
font_02_sfnt_off0000fa47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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