Malicious PDF — malware analysis report

Static analysis result for SHA-256 62051a2df3e3a7bb…

MALICIOUS

PDF

87.0 KB Created: 2021-08-05 19:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 23a9587e8f2a5b4b2c233877f6aa3007 SHA-1: 890da0007e74b95dfa72f469b0fb08e4e3431a44 SHA-256: 62051a2df3e3a7bb93c2d03248e205081b05ddcfb867fa46c725650698b6a304
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to lure users to potentially malicious sites. The presence of these links suggests an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/4hle7auvla66akbq032nb348i3/79996916104.pdf In PDF document text
    • https://ipic.vn/userfiles/file/55438660732.pdfIn PDF document text
    • http://lammermoor.net/imagenes/file/rusuminawexofep.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/wozokafaxezonegifadediwo.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/qq5b0713cnsmd0ssflvhvm5u94/wobiv.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/91971950921.pdfIn PDF document text
    • https://lesura.net/userfiles/file/36078146407.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/8e87c70917b2543765af0c170b2d4c4e/bomiwu.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/9288a4cc3341db975f9babbece7661c7/jajemavopukekavu.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608f43b5bce70---65707804721.pdfIn PDF document text
    • http://ziguratex.com/helpdesk/app/webroot/img/userfiles/files/58403465223.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/19279290400.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/8lh311praarb880k3elm3kgql2/dijigiwagefitat.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/18dea8a5ff9cafe629a6bdfcacd7f625/zemuwin.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/cd4812885ff2edb1d3718f4e275ca19f/veletivez.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/pezaxad.pdfIn PDF document text
    • https://giovannicaputoboutique.com/file/598454497.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/nirubisusibufebijukor.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/79750922529.pdfIn PDF document text
    • http://simonide.org/userfiles/file/86722679243.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b061128aaca---luzemavizo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=la+campanella+piano+sheet+music+easyPDF 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_off0000eefd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFD 17436 bytes
SHA-256: f9a7f142e3eda25b61af266ef5888b322c4a240a06de6fcef6929ed86efdcd3a
font_01_sfnt_off00011ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000134fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134FD 10708 bytes
SHA-256: ca1aeaf6d2e467b8da7e59a997aefe0694e159c302296a6f88b886a470677609

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