Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6989eb075bf853…

MALICIOUS

PDF

73.6 KB Created: 2021-07-01 14:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ddbd1531f83669763100ea7b153579de SHA-1: 9e9d71e5a66fe0c3b3fec35107ec10c6e07ee821 SHA-256: ae6989eb075bf8532889fc49c71408e3353a2096d426f99576b6a8662668cb4e
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 a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or conduct phishing. The presence of external URIs and link farms indicates a likely spearphishing attachment vector. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://laborke.ru/uplcv?utm_term=bash+iterate+over+json+array
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/d9sjtsq4ag6fostgjpai9kr0tg/dexorakotobe.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f2a78e458---71399734460.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608aca1e36b60---rekix.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/a9bd4fb18f1d14f0969a79d0dbd4a6fc/wajamominuwabi.pdf
    • https://aadhaarretail.com/administrator/imagetemp/file/12554369514.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/f7fb8e927ef43f6d73a84b8ed02d734b/74176581995.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/20e33fe34335b020a5a6b0e681d3082d/62369625372.pdf
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a79b918980---46779154940.pdf
    • https://musikkursus.dk/userfiles/file/mudulilekig.pdf
    • http://tilestone-pools.com/i/File/kokogib.pdf
    • http://dentish.ru/ckfinder/userfiles/files/53679758008.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9dad207b0---95470512158.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/8436d067c03f6083373dd272f7237620/11164366951.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084159c0c58d---zelir.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1134b17512---94564109708.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/f07513c767a2fc0a6af7c50eaaa72edd/46318327054.pdf
    • https://burlingame.com/wysiwygfiles/file/momajipoxoxomo.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a59d394cb5---19845033541.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160753917115d8---74056880731.pdf
    • http://stromzeleny.cz/file/61437792812.pdf
    • http://amirafouad.com/uploaded_files/file/laxagige.pdf
    • http://zwickerfoto.hu/_user/file/42907401156.pdf
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/28398734818.pdf
    • https://an-professional.ru/img/files/file/dapoved.pdf
    • https://fertilizerproductionprocess.com/d/files/70031258796.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/gofvbq59uluki9m6vll8b9obvq/98588126674.pdf
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/46307251944.pdf
    • http://kulturazebrak.cz/userfiles/66289360302.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd85.bin
36d8eb9de030e377d66f5c2d4b7c4b91c66ddfe84bb969ca2b26cbd7dd5d4d77		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD85 10520 bytes
font_01_sfnt_off0000d57b.bin
32608c46b48fc98a0d52e8738ccfebe4daffaf1e4b71aa06a949fde97ed7553c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD57B 16532 bytes
font_02_sfnt_off000100bf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100BF 16792 bytes

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