Malicious PDF — malware analysis report

Static analysis result for SHA-256 e00c0fe70a43d429…

MALICIOUS

PDF

85.5 KB Created: 2021-06-29 00:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ed7b259849cccb9114b503c7335bbc56 SHA-1: ddbee320840753fcb38f86d23809c126f3b26dc5 SHA-256: e00c0fe70a43d4296247e6cbd1d4c3c3e9f395d3f79d91803aad6d8afe1f21a3
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. The document contains numerous links pointing to compromised WordPress sites, specifically within the formcraft plugin's upload directory, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cccaa90932---fosokizopexaki.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/c8e3ed74355cd1aa5b91ffd842e4543b/sofoxotuzowudu.pdf
    • http://myucmas.com/userfiles/file/55528302617.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c3b0b6443---siwusebefasekutuka.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e25f2b6388---ruwitedodez.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16085f35e92091---xutemokoreze.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3687a983b3---98639221899.pdf
    • http://artospace.com/pics/file/44774938584.pdf
    • https://egyiksem.hu/uploads/file/76546549474.pdf
    • http://khodahoanglang.com/admin/webroot/upload/image/files/gimijafaduromumumitil.pdf
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac82e0d877---pixusubaguva.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b76a5ed193---seborefuvuxidodomafuka.pdf
    • http://jirehenl.com/userfiles/file/071557094600.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/69e45546a5099320b528f19a1ff48fa0/nuruwejotuxadubegu.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/d172f65774cc344399f3c082c205a70c/lepavolaxarexakezi.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1607372e0902ea---23625254820.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5c3e9f6a2---40599119131.pdf
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/73055880670.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609abfbaab312---zajelevipexugoriguwikiseb.pdf
    • http://archinfo.ru/uploads/file/29101509356.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfb1c302ab---47034065611.pdf
    • http://amirafouad.com/uploaded_files/file/39899263153.pdf
    • http://afgventuregroup.com/cfiles/file/84576994914.pdf
    • https://alakharia.com/public_html/userfiles/file/jamexilolutewesosoxi.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/76vvu8en1lhr9ub3ke0mc4nnq6/wadegufozumaxejebi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=xenoverse+2+current+version
    • 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_off0000e9d8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D8 16792 bytes
font_01_sfnt_off000101ef.bin
3757c7401e59674af60752560492a71ae0e1a403e6d2f67846c0cd96d277512b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101EF 10308 bytes
font_02_sfnt_off00011965.bin
4d3fb010da4ea12616bcdbf4207e05a38819f05a53fdbafd47031d578581668c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11965 18100 bytes

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