Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c15172ad3e2f54…

MALICIOUS

PDF

81.2 KB Created: 2021-09-07 22:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4e72c3792b791b0f39deef273f1b2791 SHA-1: 9aa8650d55696e84d7bc950b9dd044aa03f494e5 SHA-256: 60c15172ad3e2f547f43da48a5a3f5da700bea6d182131ac8958fb27b9543109
96 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised or disposable domains, a common tactic for SEO spam or distributing further malicious content. The ML classifier strongly indicated maliciousness, and the structure suggests it's designed to lead users to external, potentially harmful, sites. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • 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://ibconsulting.it/userfiles/files/63168028075.pdf In PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/fibigirusovofujatekipetun.pdfIn PDF document text
    • http://year-c.com/upload_fck/file/2021-8-21/20210821175128288919.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/8abe09aaeaf4d48553b9c27c8360f25a/60503317440.pdfIn PDF document text
    • http://bilafafafa.com/shopadmin/upload/files/wujadaxi.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/fimeboxezivo.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a1984891a---17144420264.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a410cf437e0---99609736194.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161191c82a2eb7---zevivubuxilibasutogobovak.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/c14e15a283f7e6b44be8156eb11eebae/lekudefupi.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/82398146640.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/58644105277.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/debb8330752c89edbcc24c50245f765d/48994458901.pdfIn PDF document text
    • http://agecarekorea.com/ckupload/files/kuxisofubal.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/793784ed43c61ef79f35d05d0c7c8311/gakikuvefilugudejonotus.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/puzopagewuve.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/66dbde40eb772f2a3f11cb5bacb3c00d/daxegejesugakasezojovej.pdfIn PDF document text
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/60610329494.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/21c3bc79d501ed8321bd87fa2b889ac5/rurabekoxoli.pdfIn PDF document text
    • https://blugarden.eu/file/22509169582.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/60591008503.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085799a22eb8---xemarowipup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=types+of+probability+sampling+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_off0000dca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BA 11056 bytes
SHA-256: 32fa382626505a7b9a06271ded83c7d55c53bb70c74b276c4a421482b6d0c9c1
font_02_sfnt_off00010e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E07 16272 bytes
SHA-256: 1b7addb1dbafbf7210b30fc6bb62897abaff64806e5e3db1614dcc1bf2350189