Malicious PDF — malware analysis report

Static analysis result for SHA-256 80634918a4bfb484…

MALICIOUS

PDF

119.2 KB Created: 2021-06-26 15:09:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 97ef06abcef2626795f2dade2e0939e1 SHA-1: 1a2b95c1ce847b1706b176af05051517778794cf SHA-256: 80634918a4bfb4847d4d140658434f339bdc404c955aef6ee03032c2db2317fe
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous external URIs pointing to various websites, many of which appear to be hosted on compromised CMS platforms or disposable domains. The primary purpose seems to be directing users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9691

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://medvor.ru/uplcv?utm_term=katherine+pierce+in+the+books PDF link annotation
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad736e7050f---nizijasomujowulaluzuno.pdfIn PDF document text
    • http://tomaszskiba.com/userfiles/file/muxujomazaposa.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1727e641355259565becee7607262225/42022280295.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/nc45hahdk2hggfd07fcci7rnbv/kevukelabetorawobex.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/itimmiv87f7k93f10ps4vq76m4/zodinizimaxa.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608033762bc55---25617295686.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/sorenavuk.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/lufedokezujiziwoxanonuniv.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/teromululewavosabanemuve.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/72032937064.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/45513417893.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/vilimakotinemejo.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/o5tb89m6arf4jtabhh543br3i0/visebitotulo.pdfIn PDF document text
    • https://candbco.com/ckfinder/userfiles/files/61362603274.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/dilazubifezuxunixivugebi.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/woguseja.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c625d3dcf53---nuvijunefefesuzow.pdfIn PDF document text
    • https://centrorevisionimonregalese.it/file/zedexid.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c22b149f095---fidadofalimejinujivawom.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/24834907556.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/a4b229ad89da3a5b29469fbb85b80c16/rupulapolumakutube.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/28c2115343674a2515bd232d5d52a659/75108217614.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/lejijabedu.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000142c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142C1 21580 bytes
SHA-256: 6c4fe21c33f9df00f222f4c20c32c9e130fefa55100f935bdae3dc27d6ea002b
font_01_sfnt_off00017978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17978 10648 bytes
SHA-256: 82555c538d261bced2544dd4155a56599dedfdfd03562c32d90511d93a2be79e
font_02_sfnt_off00019190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19190 1864 bytes
SHA-256: 85fdeea5c1d5ddb3eb2e7147091a505bd320a29430819679f85c9519f2a01483
font_03_sfnt_off00019a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A62 17484 bytes
SHA-256: 20695c2d3dcbfac73b0ba12dd13531594c10411b7c9d879ee4d29f6dda5f8d11
font_04_sfnt_off0001b515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B515 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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