Malicious PDF — malware analysis report

Static analysis result for SHA-256 e25a05fdd7fb4d62…

MALICIOUS

PDF

78.9 KB Created: 2021-09-07 02:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d6f4e5c93cd92962b6a9777a3ca1566d SHA-1: 1f144a31b8e77f12312d2b34177c4294db469f86 SHA-256: e25a05fdd7fb4d62223b224eab086950bdef82fcb012533874a0038f96f55dfa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm, likely to distribute malicious content or conduct phishing. The embedded JavaScript is a common method for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://amirafouad.com/uploaded_files/file/veledunenugu.pdf In PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/8043ce43b829f047e2a2059e88145dd7/toxubazumogalija.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/uai2f2jlitu11d00vfg0ouvia7/97706380531.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/0501ac92c5ff93eccc60bb8427c520d0/lutumi.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/gidulisebojotalasiw.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/40147216165.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc01f686cd5---17892707256.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/31de7003c5d928a3a6fb7dd9b8eedf6e/lodolufakexed.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1e8a8089a---kifolupixakuje.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/totisuzadifax.pdfIn PDF document text
    • http://womenscouncildallasarboretum.org/clients/85748/File/32324423143.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/bafexowoj.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/47ebe7b89bd9ce67079f61ba5f51451f/29542410064.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210710045439118779102.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/66894840777.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/ruxuva.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/a71c24df90f0a2835a66b551292851ca/demuli.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/dbdca364d12c607a7055fb96099135de/dametigobunezopagode.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/genazuzov.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160c58db33ba6e---90398359948.pdfIn PDF document text
    • https://cmf8.ir/data/file/gepir.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/52666273944.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=whirlpool+cabrio+dryer+manual+wed8000dwPDF 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_off0000cd2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2B 18080 bytes
SHA-256: 6fb04103a82da4b0d4efd6744374e93815fe51a0ee002e166b3a91579c6908cf
font_01_sfnt_off0000fb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB97 11276 bytes
SHA-256: 911597595df593f0278ced5c46f264aa2e6d0164ef10bac87047ebc4249e6781
font_02_sfnt_off000115a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1