Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46abd1b0a2d85c7…

MALICIOUS

PDF

71.2 KB Created: 2021-09-11 22:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8009c2c74ad3fc0429759bdda7d3dca6 SHA-1: 3b04f90f9de90be100aa3a795c2f20d45d6b55e2 SHA-256: e46abd1b0a2d85c7e417bcd138f102b1889a74cb7639aabab03d9e5273566af1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The file also exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised or disposable hosting sites. These elements, combined with ClamAV detection and ML classification, strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://birotex.rs/images/files/2650835409.pdf In PDF document text
    • http://jtour.vn/userfiles/file/vopipozafogenadase.pdfIn PDF document text
    • http://cuacuongiare.vn/upload/files/wiwuvob.pdfIn PDF document text
    • http://abwgulfport.com/uploads/files/17439185246.pdfIn PDF document text
    • http://jjburgerut.com/uploads/files/11188680228.pdfIn PDF document text
    • https://reparation-mobile.net/userfiles/file/71697465632.pdfIn PDF document text
    • http://nepodoshlo.kz/ckfinder/userfiles/files/tulaluwunidonimitoramu.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/7814ncgbtqngck0u7satt0tqj3/govedetuvopakekejapod.pdfIn PDF document text
    • https://heritran.vn/uploads/news_file/mitudar.pdfIn PDF document text
    • http://373113.linker.tw/files/6947759119.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/368515986.pdfIn PDF document text
    • http://lemma-studio.pl/userfiles/file/56168287630.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/vajuxijekenimitum.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/54211815029.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/mibimuduf.pdfIn PDF document text
    • http://ctmmaximoravenna.com/ckfinder/userfiles/files/76832203414.pdfIn PDF document text
    • http://japhina.com/upload/file/79447790673.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/dinowexafow.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/ao38jcnio496vk896g6c5j0n1j/vowiwexuv.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b09371cba3---rinenitojitirokorajigugiv.pdfIn PDF document text
    • http://tanabuauto.com/js/upload/files/nepexawatujesivasunaz.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/gapodaripedebekipajevupa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=movie+five+app+download+for+android+freePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E8 10368 bytes
SHA-256: a25da087d73bafae3d4d729ca151a7a1a295db19a7f00126bce06ae933e02834
font_01_sfnt_off0000cc75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC75 16736 bytes
SHA-256: a9be6d0227b43cca0a72608ca207659c4b0bca6430b60642aa71881714899d55
font_02_sfnt_off0000f764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF764 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1