Malicious PDF — malware analysis report

Static analysis result for SHA-256 e064f6aebb088274…

MALICIOUS

PDF

82.2 KB Created: 2021-09-02 03:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dd1e639c514dcbcde85a57ea61858ed3 SHA-1: baba0fa249cd151dacb950f3cbc95f013241c6ff SHA-256: e064f6aebb088274b1ad5570097b0eef77e5812fb59c77708d32cb9c61c7c3db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or are structured as link farms on disposable hosting. These characteristics strongly suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://fulepmark.hu/nyebu/fulepmark/userfiles/file/81285854760.pdf In PDF document text
    • http://jedwines.com/cmsCart//upload/file/xubas.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/wozemakuvi.pdfIn PDF document text
    • http://fabtur.ru/upload/files/kenefaboruwokomifobojosa.pdfIn PDF document text
    • http://chikatere.com/Upload/files/serevivo.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/nigutikisozamazu.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79cb47627e---7115325156.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/524f5b8bf6a4732e628356ec38c23a4b/rixugupemolemeda.pdfIn PDF document text
    • https://chris-arnold.com/userfiles/file/22882464131.pdfIn PDF document text
    • http://energosol.pl/images_cms/file/wamuva.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/28540341574.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/2244f9a891cd79e6fd65f5fece5e1270/tipaxomusutamanagawes.pdfIn PDF document text
    • http://sooclose.eu/upload/File/83839574140.pdfIn PDF document text
    • http://splogservice.ru/content/files/joruno.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/0baee0a8eefb1f33eb04f820d772dd89/81877679328.pdfIn PDF document text
    • http://dienvietbac.com/uploads/files/79132171958.pdfIn PDF document text
    • https://www.casestilistas.es//ckfinder/userfiles/files/detaborojukopeve.pdfIn PDF document text
    • https://ka-base.no/images_content/file/15556881374.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/d260cd18338513081de7703f90489dd5/91516501522.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160818d8fde7e2---dasogaxekijuvugomo.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f140b95040---53240859127.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/bks3rmq1chorsk8m28so6dhgo1/61674713598.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/89339519198.pdfIn PDF document text
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/22093738060.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=st+george%27s+anglican+churchPDF 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_off0000dafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFA 18396 bytes
SHA-256: cb34d1b016e522c78a5a9e4e185842902e907b9fff271a32520fee36a4e51b86
font_01_sfnt_off00010a9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9C 10716 bytes
SHA-256: d391f0ad8becabef2f9f42f5bc5687c520f9f7724fc530c629f9be4683f2aec5
font_02_sfnt_off00012328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12328 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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