Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b65f8a967ed2901…

MALICIOUS

PDF

102.3 KB Created: 2021-06-25 13:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f8696d65ec12e5c1fdefe0d6734498fe SHA-1: eafd98cd5ee93a5f9ee965e31ebdc3df4d55dd06 SHA-256: 1b65f8a967ed2901166fb497cb5aabcf18c70cc78211137c79f2e8d2e691847f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting it's part of a link farm designed to manipulate search engine results or redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these compromised links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://i-dron.cz/data/file/dowoxilasokifi.pdf In PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/xirabekenosuxidifirisawi.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/8v6t65cli0lelrdk5ejvhqejg6/92676903431.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/8c05f5135530d35e924bb1c9a020b82a/51038859459.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/tonumut.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1e308d3e4---69116833160.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608483c71940c---ritidi.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82de4d1840---58421126541.pdfIn PDF document text
    • http://qytbearing.com/upfile/file/vawazibo.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/fbb9024d666d90500b4d93442263c3e7/33229901832.pdfIn PDF document text
    • http://aven.su/userfiles/file/29936470143.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3bc21022e---99103058552.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/xizanikorenokego.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b94a5d6046c---taketegebivenep.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/9883292f722ce20acf8958af997789fb/30660697705.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2ca923e88---76732506242.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/e91cc953e75688bf1b13611fd5229b8c/lagukokitipodukonutaso.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c207d716b18---50091755400.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=math+class+7+rs+aggarwal+chapter+7PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11490 17984 bytes
SHA-256: b6cab59d0465711821c6fcb31bee7a4cf30525a40c267b29130072d770b863ed
font_01_sfnt_off00014435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14435 16196 bytes
SHA-256: 740db2b7ded1420854cd04494860c0d8de8397dd23681ef7cea13dfe3f1f1169
font_02_sfnt_off000159ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00017205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17205 10464 bytes
SHA-256: a1456e86dcd4c1c5c7da92ae2a1a44860b64eaa91cc711ca1cbcea028522e932

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