Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeba9294857ba268…

MALICIOUS

PDF

92.7 KB Created: 2021-07-21 17:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 35fabf309ebd54faac489c0c94371924 SHA-1: 8dbadf8ab12094069e43b2baabf597db6119f42f SHA-256: eeba9294857ba268f01cdb512c45748eabea87c9e9acf76d7d073e69239a6e86
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external URIs and is flagged as a link farm, indicating a likely attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host and distribute second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160b87dcde5067---pamesezumigiruwebe.pdf In PDF document text
    • http://argyler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070733b595e8---26055721933.pdfIn PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/77657647257.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/81519573675.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609054201b04f---fipozid.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/74339803526.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/89339176913.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/qd69n5hcg89a9vr8gh0v4sjo16/mozakul.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/59808621681.pdfIn PDF document text
    • http://cainghienbinhduong.com/uploads/userfiles/file/pebugukejufumopul.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/91212344950.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/86767961064.pdfIn PDF document text
    • https://fotokeramika.bg/userfiles/file/birurovixotum.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/nifalesozifilutesesubap.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/29955702846.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c792b3225---28872392820.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082608847400---gobozosuguxawugemexur.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/29822872065.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/40301114676.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/33765577817.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/f3cfb7c28db2c16b8476085eba5ac3ff/vojefapodep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=load+flow+calculationsPDF 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_off00010308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10308 18864 bytes
SHA-256: 9d2b37215fc9de79a710e4fa80d0ed8aa013d22d136edbd8917e8375f2e8784e
font_01_sfnt_off000135d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135D9 10380 bytes
SHA-256: 2666ca14f4e213fb7ee601fe675070d99c22567c9ea13338ad2dd786c4fa3e32
font_02_sfnt_off00014d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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