Malicious PDF — malware analysis report

Static analysis result for SHA-256 30db1fdc6cce2ed0…

MALICIOUS

PDF

87.7 KB Created: 2021-07-10 14:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e42b6b6eb1f2624da466d9a33a790e4a SHA-1: 4b4c6f8165f06e7eb23c5e07627bab58073e7fa0 SHA-256: 30db1fdc6cce2ed0eaa1d164473cd345de368fc54f62790f9dacb89105bdecdf
156 Risk Score

Malware Insights

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

This PDF file functions as a link farm, containing numerous URLs pointing to compromised CMS uploads, likely intended to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, with the primary attack pattern being a phishing lure via a document attachment. No scripts were extracted, but the presence of multiple unknown and potentially malicious URLs is a significant indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba20d3a6c44---gadeveli.pdf In PDF document text
    • http://ave-france.com/pics/files/xifunukuzi.pdfIn PDF document text
    • http://lyshiying.com/d/files/sizetaj.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/87298780074.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608c832e3dca3---pefumezasazedox.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094489deeae8---dolupewedel.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/20954893849.pdfIn PDF document text
    • https://sanidom.pl/img/file/zizimugasiwalovanisuzag.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e2042fc6779---pokumunoderetadofuli.pdfIn PDF document text
    • http://bselink.com/userfiles/file/nemewemekuripapafemajib.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/90348389383.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/24683119688.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/kegajopawuroz.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/29430942567.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/000481304d8d55b3b42a3b5f65cf785d/mukonosenalavijegufo.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075cd2fcbf4d---lelukime.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9756d28e66---97024819871.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/373193054.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2223c062f---gisekeviparazavatab.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/kogus.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/ktrkmmmngdqgr7q1vbt0u6na3d/jebepadotazadexibiwoxix.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160919e99bcb98---rojowiradejusowasidaju.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160abb09108e38---xoxopinuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=butterfly+roof+house+designsPDF 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_off0000f224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF224 10736 bytes
SHA-256: 59baf0a47a167d823c555f77d26d88749cbb91b192368eee9e37d8f8380febce
font_01_sfnt_off00010a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A97 18144 bytes
SHA-256: 68efb051e9c4036ce79caee690e20e8faf610c558f7ef7ec2a56dfcf37422e6f
font_02_sfnt_off0001398b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1398B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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