Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ecfb0eb66b5597b…

MALICIOUS

PDF

89.4 KB Created: 2021-08-11 17:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d4df6ed892c9176572bb34440d15b12b SHA-1: b8734d9e53dcf62ef4e9f37e4af71fcc9beba078 SHA-256: 5ecfb0eb66b5597b24e2625099ba59fd2ef37d02e5c1dc8aa4efd11343de5019
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to obscure the true destination. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. ClamAV detection and ML classification confirm its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://aykutemlak.com/upload/ckfinder/files/37038720731.pdf In PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/4099441952.pdfIn PDF document text
    • http://madonnina.info/userfiles/files/tifojiwupetewude.pdfIn PDF document text
    • http://oicenglish.com/imagexx/files/kosofaxetoxagamadebakav.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/69cc1320072e3f67156fd41727e72e06/zinetorazipobemituk.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/1520350b76412cf8e6b862fc94f2b289/nabanexobebewuja.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///39910713199.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f71a373273d---lamulew.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe29c4c81ac---49128429022.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d56eee42798---75662777724.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/jlni05gm8mkfqrh0625lb4vj52/linokevufudoxuwudovizuf.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/60783436688.pdfIn PDF document text
    • https://emmaushuis.org/pages/29359358446.pdfIn PDF document text
    • http://ehsclassof64.com/clients/b/bf/bfa5c4411462ceee4a19e543862d902c/File/bigogawik.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160969276dda4e---bemijikepuwateguvidijefij.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f26787e2c---fozaroremejavarevat.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/51645785580.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089eef322635---mupafufipulodavukidomo.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/ed0780a9b22a14014a357e6a83e6a3f8/melewuwexovugu.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/wimadapuvaxagelu.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/lusigewazemipirepik.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/xopetekav.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610897d0847d8---jagukonewet.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c22b959e6---gubefusamebewevek.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/0eb11f28721ec5f606ecea81394abe95/modujamilabox.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/54819862968.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=descargar+inmunologia+de+abbas+9+edicion+pdfPDF 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_off0000f229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF229 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A40 11276 bytes
SHA-256: 70e7cf3172c5dbeac18bec90395595face0d1f0ca0e862bb590aefe77c067d3a
font_02_sfnt_off0001243a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243A 19124 bytes
SHA-256: c5307376da2ff1fcdbb260f85e7e4652c2892f0f0af723cd016053352a6b9c5f

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