Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd4451f71687e18…

MALICIOUS

PDF

79.6 KB Created: 2021-08-10 05:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fc9f32dddfc4eec5e818c8b321c56725 SHA-1: 47dd202de819ca7a1ee8078d18a411ba9d4ac891 SHA-256: 1bd4451f71687e18865895d8cd73aff12a4e3f93f6760a0321e13a1a69f34cae
154 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The PDF structure and link farm characteristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9355

Heuristics 5

  • 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
  • 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.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da38319c31a---75495262229.pdf
    • http://soles2walk.cz/data/file/336910776.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce7175da15---lekoxibafatuforele.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/hcc8jsh89s0b9th07fg0tup33s/56627512349.pdf
    • http://cestovni-postylka.eu/userfiles/file/13213851003.pdf
    • http://castanienfamily.com/clients/74558/File/51183573633.pdf
    • http://www.deep2001.com/images/library/File/wixujejibumometixejapitek.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a08c035fc---54476610004.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d45aa69fadf---7202705532.pdf
    • http://ontsgoi.shop/uploads/files/sufapetofijulawaxemogajog.pdf
    • http://studioarclab.eu/userfiles/files/16996680435.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/9e04a64b9b133cdb4a4d565652da0f72/91922954122.pdf
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/63515556301.pdf
    • http://barcelonasixtytwo.com/userfiles/file/ralobexabim.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b096faed27---2274604708.pdf
    • http://www.contectrade.hu/fckfiles/file/80773354400.pdf
    • https://ottenburger.com/userfiles/file/bogexig.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/8a4f5d855c5f228d4c07c8aed1a62176/29116050743.pdf
    • http://dichvugiayphep.biz/upload/ck/files/9801553411.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/e62rc40k1u69oj085clgrhajp2/13387457133.pdf
    • http://jorkurojus.com/userfiles/file/womojosuvofaboxorak.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b5f57406c1---67346257817.pdf
    • http://benevolo.it/userfiles/files/95178956155.pdf
    • http://cesishotel.lv/res/wysiwyg/file/petifebunelig.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5117bead14---situtofijowukevaj.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+to+produce+a+project+management+plan
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fac1.bin
6e90d1088bc83e7a635b229fca71fd379ea0f9765a83b988a34670a4695f71bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC1 10904 bytes
font_01_sfnt_off000113cc.bin
16240c6063561c889a6926f0f174a0cc6108baa796cc820ea9678be975066834		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113CC 16952 bytes

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