Malicious PDF — malware analysis report

Static analysis result for SHA-256 daed7761246d77e1…

MALICIOUS

PDF

79.2 KB Created: 2021-09-06 22:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 98a8a3ce2bfcadf38b9da5e2432edbc1 SHA-1: 8d1cbfc5aafd24a8c6211d6166726ef66ab281e0 SHA-256: daed7761246d77e17330b84e401afba6312bc1e55d129725cbd142668fa888a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting it functions as a link farm to distribute malicious content or facilitate phishing. The presence of external URIs and link farms indicates an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 https://wastran.ru/uplcv?utm_term=elements+of+effective+communication+4th+edition+pdf PDF link annotation
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf31a04d12---rogiv.pdfIn PDF document text
    • http://cristalensi.com/public/File/83425712190.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/52947347190.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/99925045282.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/60ja2dpcnbseeslh71b37rq9c5/30681006076.pdfIn PDF document text
    • http://farashimirooz.com/files/kigewiwibe.pdfIn PDF document text
    • http://predit.ru/admin/ckfinder/userfiles/files/vejaladawafudugonunukuz.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160aeac4a69a7b---52390234009.pdfIn PDF document text
    • http://www.chubsorn.com/file/files/fimeniwafufun.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/e07fd45b25c7b77b3353ebb58cad6709/3750351057.pdfIn PDF document text
    • http://www.ap-arte.ro/fckupload/file/65503477679.pdfIn PDF document text
    • http://hchs1972.com/clients/2/2c/2cb73362227bcfbd3ed6ae01b5b3dc46/File/lilanujaxefaxora.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e136e36dd2b---nutababeridepuvibepogexob.pdfIn PDF document text
    • http://mwclass197050threunion.com/clients/0/04/04fd426b2d2cb16e649a8dfb8bed347f/File/44913616450.pdfIn PDF document text
    • http://standartbio.com/fckfiles/file/kivadokojozonevojomegaru.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/fe119f7f24572f858e823721cf1279a1/nodikotukujomiwuvar.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/od6sm311ere4cgm2n8u6ud2nn4/sitalajo.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/3946ts2th5bm9fv5qk1itc69fo/51716887650.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d7835d72a---47398366283.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/wozomilabizaf.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/gufidekebuv.pdfIn PDF document text
    • https://10s317.com/uploads/files/202108261317022830.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/72614344317.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/xeloparepakinivifuf.pdfIn PDF document text
    • http://alotercuman.com/ckfinder/userfiles/files/gawifesabo.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/13dfafbe1862c13e367d8747b3cf542e/xibefefojolo.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/17335320954.pdfIn PDF document text
    • 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_off0000cfe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE2 11012 bytes
SHA-256: d131ff87b498a46a318571fdeff169b922630e8e7e159bdd05c141e4a7d2d888
font_01_sfnt_off0000e95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001016f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016F 17340 bytes
SHA-256: 4d723065c4a3ac7f701ca32f55fc238d574e4785ee07ea37d7f7c6a8f1c34067

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