Malicious PDF — malware analysis report

Static analysis result for SHA-256 054d7d74a45ac1db…

MALICIOUS

PDF

79.5 KB Created: 2021-09-20 08:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6445206dfbcdfff352a2c1ba1f596c37 SHA-1: 8d098ec0d7afad11eb33099484714da27cd9bad0 SHA-256: 054d7d74a45ac1db5ea8a979fa495ddb7d328be184b8159fe2735888c0dc521b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cgeminfos.ma/upload/file/rutoporolejefeboj.pdf In PDF document text
    • https://luatkhangthai.vn/upload/fck/file/29332938247.pdfIn PDF document text
    • http://hidropro.hu/upload/32978873569.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/57496370124.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/55ac5abe76591d85084f4860737594ca/42026806699.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/vetemafe.pdfIn PDF document text
    • https://watosaphotography.com/app/webroot/userfiles/files/20210907_005129.pdfIn PDF document text
    • http://www.recko.ru/ckfinder/userfiles/files/jigowumotapa.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9faa79280---35063374701.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/52007583900.pdfIn PDF document text
    • https://newsale.linyn.mobi/upload/ckeditor/pages/files/fefowipexanidapiwixogu.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/zuxoba.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/36944866338.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/7098eebfc0d20afe9ce0e969da4bc7fa/fajerolajexirulok.pdfIn PDF document text
    • http://suspensionestg.mx/userfiles/file/puwajowixodipekekabopexa.pdfIn PDF document text
    • http://www.biosafety.biz/ckfinder/userfiles/files/97930793564.pdfIn PDF document text
    • http://retailpark.bg/uploads/wysiwyg/files/57300785722.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/madukiwomo.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/wakuwutuluwulejofe.pdfIn PDF document text
    • https://textosl.com/upload/editor/file/gisewefawetovasami.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/doladog.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/161329a79573df---58568174403.pdfIn PDF document text
    • http://inciboya.com/resimler/site/files/rilorim.pdfIn PDF document text
    • http://isotope3.pm-ural.com/uploads/files/xutuxujezamerofegin.pdfIn PDF document text
    • https://monyetmesum.com/contents/files/fepowovakite.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=free+fifty+shades+freed+full+moviePDF 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_off0000d63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63F 10772 bytes
SHA-256: 4f2bdafd45f607a5f42af8a62dfc8eff70af249cbc97e0aedf72413190584b8c
font_01_sfnt_off0000ef13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF13 15820 bytes
SHA-256: 35fd225b35c934c9924734fbeae34b68fd277c24da635be46b9a2f482a2b73cb
font_02_sfnt_off000117dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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