Malicious PDF — malware analysis report

Static analysis result for SHA-256 2016df86adaa6f4b…

MALICIOUS

PDF

99.6 KB Created: 2021-06-26 00:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: edbf9b7449ee415f2d0ecb1adb542c00 SHA-1: bdc490fa341447d7a41234de7d31e1f21c28e03b SHA-256: 2016df86adaa6f4b26932819bbc8724c8e90d8f5cb75765a0636b6688e0363b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites, which in turn host other PDF files. This pattern suggests a link farm designed to obscure the ultimate destination, likely a phishing page or malware download. The ClamAV detection and ML classifier strongly indicate malicious intent, with the URLs serving as the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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://inwebjor.ru/uplcv?utm_term=the+theme+of+the+rime+of+the+ancient+mariner PDF link annotation
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d64a8b36105---juvefepa.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/d07a147ef1bacf86a47cce0ac0f47576/96983799833.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/dc9ef18d718353b311826e00d06cc11d/63313768304.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/jofemewate.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/54126723595.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/01e955f9a96b72b112b73994c7a1b816/wojitetiwimufakuzereduji.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/r2hhno2umi19976gaj8a87bvdu/vinamu.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16081f678a4c30---7069434845.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/14ls81rn1a5asnbdeknjsbr0i3/matanodikupevekikesijo.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081f2a2adcf7---77943077941.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4f39173b0---61257900240.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/10fbbbe25184bdab67153e59a4750f30/9497903837.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/6a5l42s3rkfrh5sfajs16b9lt2/letamupukofo.pdfIn PDF document text
    • http://ashioke.com/images/library/File/53220856021.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/zukeno.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160906e4f81baf---nufisafexapunedebuwes.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/29916378683.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/66057325aa9f85523ae18d59dfbb3c36/zibowexidatoserotike.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/i7s6j449mhq7nnr7tdgjlj3j53/62432178337.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1608333dedb1b7---10714442060.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607614a23238c---60473105695.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b72c6dbb8---debib.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/1b84adebfeb06b47d732c96e315bb128/surifoto.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/4041c4f410744749749b9d8b81dcf70a/99078825119.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072396958455---69258539255.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8b1905ad4---38294946918.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_off0001241d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C2F 17544 bytes
SHA-256: 9c84ca044d1ffd7857f09d5b92e35cbbcb4d63a2f74a15bf43529e92083543e0
font_02_sfnt_off00016a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A04 10352 bytes
SHA-256: f450aea13c5fa4f8b193cbabd2506e729225c0d8183fdecd6ccb0003417ff744

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