Malicious PDF — malware analysis report

Static analysis result for SHA-256 6daebef1a34c5999…

MALICIOUS

PDF

70.9 KB Created: 2021-06-26 23:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: d5a10d1b27eef4619dc5eecf40079355 SHA-1: 1dca0fb7f99048ebe2af0da3f3cf19c45c50ff68 SHA-256: 6daebef1a34c5999d5f5271bf50b6fc2e16595b5019cbafb961cf3cfee79babf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://drafthe.ru/uplcv?utm_term=beck+anxiety+inventory+for+youth+pdf PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a041ec69a93---67285574002.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/97c10caa1c7c8b74adc4aa4bbea6c65d/nitijokeka.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/rejagesa.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/5695346651.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d7567c5a3---37583848781.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607aadb19a76c---40925889835.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc7cc0e979---mitegusuvakafavosa.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/qhsc9e9v7h2v08mfivblc6opn6/lasuxiwizopabamotebuduko.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813f0042aac---21932488626.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a2aa58d03---barumuxawologa.pdfIn PDF document text
    • https://pindimana.in/uploads/file/fajuninejezejulaxaluje.pdfIn PDF document text
    • http://charivne.info/images/file/zoxazexutawaxebuje.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/jederetugago.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/detozekapuwumu.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/safisexiwavigulamuzi.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/lefozizu.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-6-23/20210623052540988496.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072d46a51d24---96215121007.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3a84d1817---fawaza.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d327fb493f---91813750931.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/47510ae04476bfc75b0455aac4584068/92481128874.pdfIn PDF document text
    • https://aedwea.com/upload/foto/95114868196.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_off0000b457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB457 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC69 15744 bytes
SHA-256: c4956ae7bffad45006a8eb0fdd1ed3cb2c9c5c8a98a791f5eb12ca4bf000d0ee
font_02_sfnt_off0000f4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D3 11032 bytes
SHA-256: 314cb66a5992eb52b365efccb1ed4e3836a39be4ea29ec1b07542a15f139f1cb

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