Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b8058bb63981a9a…

MALICIOUS

PDF

86.2 KB Created: 2021-08-25 05:32:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5a99b0c9127454fb2d7b6167b7f052e5 SHA-1: b94babcfb76986d65e59e8c52eb97b4f53508978 SHA-256: 6b8058bb63981a9a8269a078014a63b3d3f2088bafbae83b6fd9d968362c86ea
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as containing malicious links and being part of a link farm hosted on compromised or disposable domains. The ML classifier and ClamAV also strongly indicated maliciousness. The embedded links likely lead to phishing sites or further malware downloads, aiming to trick the user into visiting them.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://landbondcorten.com/attachment/file/52ad66397188c30e0b3444ba74f04b89.pdf In PDF document text
    • https://signika.pl/Upload/file/17776335548.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/dogewadoxixoperomir.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/h61reiiqlu1ae49nf8vl3pnc76/73601513271.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/9e4a1a288a1bb6fb02f3c8b64a2b392f/63418928023.pdfIn PDF document text
    • https://hirurgija.me//files/75392259247.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/megapobizibilitude.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210503063219.pdfIn PDF document text
    • http://stasta.com/userfiles/file/96781055835.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/41280960632.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/2c701b69e3f8052ea31f2cd124fbc8d9/ripekududolokanafexe.pdfIn PDF document text
    • http://boxethai38.com/upload/file/litadozo.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/170d6e40962d3239522ace874ee9df8f/zejojiduduwutuzuvag.pdfIn PDF document text
    • http://ypperfect.com/ckfinder/userfiles/files/ninozonigodiwo.pdfIn PDF document text
    • https://carmelocuritiba.com.br/ckfinder/userfiles/files/palazamitinebexotevejede.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/2j91b41kjf2f2chb9dn0on3ac4/16095159083.pdfIn PDF document text
    • https://hgb.se/filer/file/79630076042.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/658627adf7bc6b519cc036df0670e2c6/1498982613.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bba2f562ae---sorikumux.pdfIn PDF document text
    • http://veterinariacasettamattei.it/userfiles/files/tubotevozu.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210714_5B65E3291037A793.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c87e1d65e84---dijefegir.pdfPDF link annotation
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/37167270996.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=burn+this+play+read+onlinePDF 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_off0000ec70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC70 17740 bytes
SHA-256: ac1bc6498446fec0bced074f02ca86c6c24fc7ce64fd2e2f1d9132249e219180
font_01_sfnt_off00011acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E4 10756 bytes
SHA-256: 97531d66abf1e51da61181b351aa182ce2a1aadb4b43cf024408fc8ed79d93a2