Malicious PDF — malware analysis report

Static analysis result for SHA-256 30380e4cdd9bd929…

MALICIOUS

PDF

64.0 KB Created: 2021-09-15 19:27:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5ba7cd2c0d553880e53d427318cc3c5b SHA-1: 099a4a47c321aadba487fee04e2fa9c323739172 SHA-256: 30380e4cdd9bd9290470c6d12c385819da697ff0bbeeb5667bb327f2900e1490
154 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a PDF link farm. It contains numerous URLs pointing to external sites, many of which are hosted on potentially disposable domains or compromised CMS uploads. The primary purpose appears to be directing users to these external resources, which could host phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7073

Heuristics 5

  • 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
  • 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://coretry.ru/uplcv?utm_term=how+to+jailbreak+iphone+6+without+computer PDF link annotation
    • http://swapnakoodu.com/fck_uploads/file/vatunatakupagesi.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/88528915258.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/73170121580.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/52841286034.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/bisifelax.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/dofabuvosenevudiva.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aba2dcfebb---gejoxido.pdfIn PDF document text
    • https://sgicorp.com/userfiles/files/99408478735.pdfIn PDF document text
    • http://votejoedestefano.com/editorData/file/revixizexasop.pdfIn PDF document text
    • http://auburn-companies.com/userfiles/files/34267702496.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/161342698409ba---83517844916.pdfIn PDF document text
    • http://siciny.pl/userfiles/file/84957591728.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/vibugemulukonimad.pdfIn PDF document text
    • https://horizontire.com/userfiles/file/tapadunuxatikisika.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/nexeb.pdfIn PDF document text
    • http://citygclub.com/ckupload/files/58277955987.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/41964832653.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614219bf586b3---19496887709.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/83814742334.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/sapuvibudixunid.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/42567907037.pdfIn PDF document text
    • http://ky-auto.com/uploadfile/files/55600068958.pdfIn PDF document text
    • http://naoshima-habitant.com/images/blog/file/91178024324.pdfIn PDF document text
    • http://crm333.com/documentos/file/parurusigos.pdfIn PDF document text
    • http://sun-dr.com/uploads/files/202109052224063644.pdfIn PDF document text
    • http://signauction.net/userfiles/file/86710440179.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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