Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ed13c9c667b4ce…

MALICIOUS

PDF

83.3 KB Created: 2021-09-01 03:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4b3aba6918d31782825ca205502673e6 SHA-1: 3d0cecda1ac8029081a7313cf9b25fcd59715f2d SHA-256: 06ed13c9c667b4ce72841b2ad61995e3854c3c16fd63d3ef7d1a5f193fc38dee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to external resources, many of which are hosted on compromised websites. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics indicate a high likelihood of malicious intent, specifically identified as phishing or a trojan. The presence of a link farm on disposable hosting further supports this assessment, suggesting an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ketchas.ru/uplcv?utm_term=roger+hargreaves+pdf PDF link annotation
    • http://maristaslardero.es/userfiles/file/xasusomuw.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/wetowel.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/161289cd4ce2e4---46119975418.pdfIn PDF document text
    • http://kiuanai.com/userfiles/file/89923935720.pdfIn PDF document text
    • http://mizuho-co.net/file/ck/files/masonovikok.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4b457511ed---moxobujubur.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/50cfd6a6a0d1bb149a57818bebb8a003/96367939064.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608097be00c54---butedizuduvap.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/mnnpd30fel6ki3eatokj0l0cs9/80336907130.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610eb6381a842---rirekejeduv.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/xederiwiguzezima.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/bebogewogewejeseseliduko.pdfIn PDF document text
    • http://shelton1961.com/clients/35589/File/vumuzewodukizix.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/5hrjjsgplpjnlo68c9s79887qp/jekokimude.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/218b98c1003046bd50ecbf6553337106/47035165292.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608624d46fc99---vugefaneg.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/pixelikema.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/32aa6420737c85369ad6971e62cc540c/gedaripifukupiro.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/59382039129.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa24e8b179---puledulisakalilanurupas.pdfIn PDF document text
    • https://evboosters.com/wp-content/plugins/super-forms/uploads/php/files/2a5672cf98db36c7f611fbcf0c5597d0/96319685682.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/e8c493633c7ce09864dd7ef77a0c0f7e/86521063037.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608666fbea777---40842635836.pdfIn PDF document text
    • 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_off0000e0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C1 17744 bytes
SHA-256: 1c1e6290e3c85941674c4f70b385a694bfe120d71f211f616dea3f54aca9ab8d
font_01_sfnt_off00010f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12787 10548 bytes
SHA-256: e7d8995e341587912845be5a08de1b84464d29d00983b7067dc48e7a5278a991

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