Malicious PDF — malware analysis report

Static analysis result for SHA-256 60bf3aa3e252a79c…

MALICIOUS

PDF

84.2 KB Created: 2021-09-02 09:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a30e39c409accada2216da4ec3bf4fe6 SHA-1: afb1f6305c0634a46a2486f70aa41e5e46be721e SHA-256: 60bf3aa3e252a79c10b32351342996879cc73ac6f221822388224b0829823f21
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites, indicating a phishing or malicious content distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/im8jn6mp1k8v8pqqk486utfht7/pipuxor.pdf In PDF document text
    • http://southport1969.com/clients/861680/File/xokenikadow.pdfIn PDF document text
    • https://on-call-anatomist.org/ckfinder/userfiles/files/59990309337.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/88701153517.pdfIn PDF document text
    • http://uktohabbarijamalta.com/files/file/senojavobiwubefafeped.pdfIn PDF document text
    • https://netlandschool.cl/files/70185435994.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160d199c368ddc---raminaxiva.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/65240832960.pdfIn PDF document text
    • http://msdoubrava.cz/foto/images/file/74654541050.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a9fd275c7---mariwalupamopozog.pdfIn PDF document text
    • http://aawyx.com/sites/default/imageuser/file/76850427569.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/b973362f844c2a7159099a8f21f7f460/nodolatu.pdfIn PDF document text
    • http://phillipsbrothersmill.com/clients/6/65/65192871cce8a6e36080a9ebd2808b02/File/zigepelitoxitinunub.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/216132553e9b21175deb4435f9cf4596/towiwerusiluzewokijanifiz.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/74043166464.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///fogudali.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/79032224732.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/54718331291.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/57205473614.pdfIn PDF document text
    • http://jghsclass75.com/clients/f/f3/f322050927ea28328664fd088939ffaa/File/sixulogabejutog.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/24891462068.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/lokopor.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/5c0ff0ca4f135c54079402ad60b883a1/27247145801.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/66335973325.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1606f05803c6b9---wowafidinapugan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=bad+si+joint+painPDF 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_off0000e772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE772 10292 bytes
SHA-256: 4554d7805b20f92dec3ca963f777788b9eff3023d6a38577fc19800f541ab5be
font_01_sfnt_off0000feae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C0 17040 bytes
SHA-256: 2b298fef812ee0d6683ba36cafa0d50abe8e1f47c54a2ea0b8a53ad2c31af96d