Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f6976cf50a7e9bf…

MALICIOUS

PDF

109.4 KB Created: 2021-06-28 15:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2fb0fbd7f292bcdf713a7073fa600c45 SHA-1: a0c40b35dab26fe21c4a7071f755ce7dfb85a81b SHA-256: 5f6976cf50a7e9bfd8158238f06d4bb4900fd8624a5f6c0a6176ef1bb7a37b1b
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate a phishing or malicious intent. No scripts were extracted, but the structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7477030c5---wiserazudozuzilimala.pdf In PDF document text
    • https://coevent.ru/upload/files/80098579491.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/jikofakexizodimeg.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087648e1475b---fuluranume.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/b59b0e71e4d35065ccf41109a5e9534f/17141765034.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a8d1bb875---jegunerirurupifovariziwap.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ro6feiq8v09gamdk08bskuh7o0/vaguronugowerurajevewupi.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbdeec8763---47428835354.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/2dne8ur1rb6jshq9neehgbmn5s/kudaba.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/21330622995.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b567601aeb9---10229794211.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081c692764dd---niliwanogurexux.pdfIn PDF document text
    • http://becucci.it/userfiles/files/15784042184.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/41702858528.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/44938741167.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/sogoremofavazeto.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098962d03e00---togajujilabawodujap.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/16859588796.pdfIn PDF document text
    • http://momsystem.ru/public/file/fulexokerewakin.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/renipodov.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/pn7jh4vp0hi44sc5kgc3p96in0/95846626344.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/h7itc3iaoeb0bne0b3k99daev7/41766137169.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/44914222627.pdfIn PDF document text
    • http://indovinandoilmondo.it/themes/userfiles//files/gerorazelelonojitipejit.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202106081857104850.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=latex+footnote+with+asteriskPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10351 15792 bytes
SHA-256: 51d8dfb8acf901e91446019b435a234fde30f3a4fe463dcdde4572b0ce8f1a4d
font_01_sfnt_off0001270f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270F 10504 bytes
SHA-256: a81ba4f09607066b2c45020ed720a067565ff7dff66ac713ccc550021e1866d7
font_02_sfnt_off00013f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F01 20400 bytes
SHA-256: f09fc71b20bb9feec6685697a762dce616129753c52564594bf556f361cdb1a0
font_03_sfnt_off000174e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00018cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CF6 16984 bytes
SHA-256: 0831cf9f19a7fa67313948f96fc10936d05f0f3d5475b1e5d8e9f826a60a3a3a

Open this report in the interactive analyzer, or submit your own file for analysis.