Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c6de405746799a2…

MALICIOUS

PDF

85.5 KB Created: 2021-07-23 05:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 455912f53439156cd38dcc0caee6e3e6 SHA-1: 2ec1930bea6479877d68439b56d3f2c311299fbc SHA-256: 7c6de405746799a29049a1d652e3a8e473e9c59517b80543c5246fb5c1d2e4df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish or redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/acb0c0839f720121634117f3cb9c8704/56987465998.pdf In PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1607322007feee---woxarufelebusikawu.pdfIn PDF document text
    • http://candientushinko.com/images/file/58730453824.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/gofipotu.pdfIn PDF document text
    • https://podimercrm.com/img/files/77400062122.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0f6b2712d---94437966784.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16091d818a3a2b---85167070262.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/19794770950.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/10682909954.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16072c6aedef91---77169626476.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/30860097472.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/tekazoboraluvo.pdfIn PDF document text
    • http://diamondsnspurs.com/clients/12200/File/35196199704.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874ed042aec---jadefumunija.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/85a23d8d33dfd1291e44b2e90e472230/94719590539.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2dd457e71a---19733183079.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=cost+to+spay+a+dog+at+vetPDF 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_off0000ebf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF5 10436 bytes
SHA-256: 1409d471fa86c7294037fb2dce31a6a5a04b9077afc2a6552e34805ebc327b74
font_01_sfnt_off0001039f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB1 17116 bytes
SHA-256: c1584092c745243bd3990afcdd41e6be333dbcbe4bb1eabb2609a7171924187a

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