Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ade58ea50dfb20…

MALICIOUS

PDF

69.3 KB Created: 2021-09-05 10:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e93dea99c23df8df06a12a8027166080 SHA-1: 55a2e571fd0b700db24602a99620666aed1a4d9d SHA-256: 64ade58ea50dfb20e6fcff83a708176f54f9d2cb48e235643f9627971b1f8ce1
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or are structured as link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • 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
  • 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://abacusnancy.com/userfiles/file/pilexinanirolutej.pdf In PDF document text
    • http://krr-nfe.com/suratnfe/UserFiles/File/gavebololab.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3ad02a7ad---nedenumojabifuwemo.pdfIn PDF document text
    • http://morecoredesign.com/images/imageUps/files/65510135340.pdfIn PDF document text
    • http://liberty67.com/clients/41815/File/jorokoxavusuwinedetivid.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16083bc4a7e4cf---69949630596.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608848d0d6e4d---91014430218.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/14293467764.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/rujikabunurasoru.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba064a50b0a---82854848271.pdfIn PDF document text
    • http://kunbot.com/upload/files/sufadogeguloxapivix.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/c5213155b000fbb4a73205d80ee1a3a7/tipifevomejawip.pdfIn PDF document text
    • http://www.christianhouseshare.com.au/ckfinder/userfiles/files/44971456413.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16084e8470c073---22355715960.pdfIn PDF document text
    • https://armenia4d.com/contents//files/ximofimatidifape.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab9a151cad---23035809608.pdfIn PDF document text
    • https://mytopics.it/uploads/file/92142048567.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/9a989b9602ba3aebffb7b91b7a9e38a3/vijirotowopobon.pdfIn PDF document text
    • http://master-br.ru/img/file/lujosi.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/702195471e8ffc12f7d699141a00f9fe/86835422286.pdfIn PDF document text
    • http://newworldss.com/uploads/file/mekudevakosabe.pdfIn PDF document text
    • http://adec-interiors.net/Uploads/file/tewofavopunew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=nitro+cloud+pdf+to+ppt+converterPDF 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_off0000b17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB17F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC991 15316 bytes
SHA-256: 16c47d82457a862f168a51dde34b6c6aa13d9d11ddc2a133b4a3562c47b13e56
font_02_sfnt_off0000f009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF009 10428 bytes
SHA-256: 16cf58ad682f3aef6a87b563be89410bb870e3264ee90a4fc581a51491f6e66c

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