Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd0ad1187b266d7…

MALICIOUS

PDF

72.7 KB Created: 2021-06-26 11:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3a446c336aa10627aed465ae90eca80a SHA-1: e345c95d13c9ed7835eac090009785085de88d3f SHA-256: 5cd0ad1187b266d7c11805544e6b705ed76af88900715720c810b8c7e479b5a2
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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 http://www.vegagastro.pl/upload/file/19804260842.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9d59a5e78---13633080742.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ae111179641---nijazekagumu.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160cea1602f157---kenerijerefopi.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075491d9ecb9---71620725192.pdf
    • http://amoy-art.com/Upload/file/zapolisejanezuvizelir.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/20f814ec7e5b717b3b80994eb3e9adf9/90071365200.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da7713ad7f---fakajiwisinufames.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/c9ce72d4d17704de3f3cd36f750b02c3/11777920754.pdf
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/56517471951.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baf5387a169---52246552.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/5a62657c3a828f1a46aa3fd73df4aa4b/83043155829.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/c8677093d9cc4253558aac88fa36623c/94450657857.pdf
    • http://jyjwqj.com/uploadfile/file///2021060402422315.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/82194203180be3a0cf150c60824bdf98/60476014922.pdf
    • http://shreejians.com/userfiles/file/38175966873.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/pmk9pajr07lp7vosqpjpkghhpv/60633771793.pdf
    • https://deepankarbasu.com/FCKeditor/file/kobojirodalevojimuper.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608121e80baad---sanaguja.pdf
    • https://strechybenesov.cz/content/69663710191.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/fdaa91bd90cb1a082fe6a3ca1000a7a9/51289144861.pdf
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081966f8e596---46819383600.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/jkfi8vb6d0vm1tn4i6pua8f0hg/28610191768.pdf
    • http://studiotecnicomartani.eu/userfiles/files/66412686399.pdf
    • https://office-agglo-larochelle.fr/userfiles/file/98914186037.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873b109be40---98466584772.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086eedfd530e---93482609757.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=excel+cell+text+multiple+lines
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdbd.bin
2431fcea3cd9af256a98cd16e2b2612676e6d06fa6b7ab97cbb774d3f9f05e83
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDBD 15768 bytes
font_01_sfnt_off0000e602.bin
79e6da70a9a76991814615aaa6a461e91092eb268fb34fb9abcf8857653c977d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE602 10340 bytes
font_02_sfnt_off0000fd53.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD53 16792 bytes