Malicious PDF — malware analysis report

Static analysis result for SHA-256 003e98d0ce275ad5…

MALICIOUS

PDF

95.8 KB Created: 2021-07-30 22:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7321eff32bae2ee9260516b77dd8022c SHA-1: 3913248df8748d7ca55a6a9a1596f51c01b43f20 SHA-256: 003e98d0ce275ad5ba32ff31badbce82f2a1c4dd18232e3ddd9d40c73cc2236e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs pointing to compromised WordPress sites and other disposable hosting. These elements suggest the PDF is designed to exploit vulnerabilities or trick users into visiting malicious sites, likely to download further malware or conduct phishing. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://coretry.ru/uplcv?utm_term=camera+focus+test+chart+pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/93ibhusmjmrkdobjc6m7o8ita6/8874904721.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/8e8e90b4991f8d0a34f42850b9837b15/peresokofelojujeneji.pdf
    • http://billedbutikken.dk/articlefiles/file/60341223674.pdf
    • http://belst.by/upload/file/wewitagepukalofevi.pdf
    • http://didula.com/img/file/94694084665.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6cbea09af---4265137776.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16094a432ea900---83349777945.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/2f6544c8f31f2ea2e0bf7eb435c3eb4f/58772215925.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc8578302e---mokomaroxul.pdf
    • http://proreferee.ru/uploads/ckfinder/files/dezifosudesajarekan.pdf
    • https://parklanehotel.asia/userfiles/file/selinut.pdf
    • https://avenue102.com/uploads/file/peginofukoxe.pdf
    • http://www.abcklima.hu//data/editorfile/62864518907.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9094600613---najupawudedokavage.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160998927ed1bc---wupopanamululalinise.pdf
    • http://mastera-mix.ru/ckfinder/userfiles/files/vanexakorejipowirukeg.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/42mo10el0hc73sj0noath6r0uv/gugesisixofuviv.pdf
    • https://zaragozadenoche.es/upload/files/73000978638.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/d295cc385fcd2aec22ac47a4c3f677ea/gawebugo.pdf
    • http://faithleader.org/js/ckfinder/userfiles/files/56025394722.pdf
    • http://taxilitomerice.cz/ckfinder/userfiles/files/86530382256.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/ev1acv13gn51qefj1dukrvt0im/67005524470.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160731f84d1504---wodimopasafedamen.pdf
    • http://soles2walk.cz/data/file/82836070343.pdf
    • https://bakwanudang.com/contents//files/12602866196.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010561.bin
6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10561 1692 bytes
font_01_sfnt_off00010d65.bin
354e8f2243f914899c9c97138f594a3a077c62e0eecf2608c61f242e9bcbd829		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D65 18268 bytes
font_02_sfnt_off00013d8f.bin
2830b89b4cf3a6fb36cd081adb5e2e1c9e020e71c48eda93fbe9ea06fb1ab792		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D8F 10776 bytes
font_03_sfnt_off00015666.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15666 16792 bytes

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