Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b0aa0b47c159ed9…

MALICIOUS

PDF

107.0 KB Created: 2021-09-15 20:07:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 49ef51f49ea05dedd0badec869a6efd6 SHA-1: 1e7ad66fcffe28f5e299a3faa94029e01e9d2709 SHA-256: 6b0aa0b47c159ed9db9e807b554075e7ca54f32b3516fe70abf1555ffb6c5f54
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing users to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are likely used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://chcial.ru/uplcv?utm_term=las+pinas+zip+code+pilar+village PDF link annotation
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/219ccecde7a2df6a33449158887525bf/66116426694.pdfIn PDF document text
    • http://wwm-quanta.com/upload/files/84892613135.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1614139af12c8e---jukalanoliwojilugojetikiw.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613fcdf1edd83---49544038038.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/3rd3sld9v57resdtb82ecde2d1/38225005740.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/kepenegife.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/wofebezifezadalazi.pdfIn PDF document text
    • https://keongracun.org/contents/files/67320894247.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-9-8/20210908083541458730.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/34721746820.pdfIn PDF document text
    • https://cokhivietuc.com/img-vietuc/files/91780066082.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/14e119c3110d18f9cb12ceadcce5b8d6/tuzibanegaziboxuxexe.pdfIn PDF document text
    • http://lumieye.com/userData/ebizro_board/file/73396122555.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/53645857331.pdfIn PDF document text
    • http://hadt.vn/upload/files/77074164569.pdfIn PDF document text
    • https://marwaservicecenter.com/nbloom/fckuploads/file/30463891155.pdfIn PDF document text
    • https://szemvidito.hu/sfwkr/feltoltesek/Images/Image/91752943835.pdfIn PDF document text
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/10961440142.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/18108653578.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/nivovatigiwizes.pdfIn PDF document text
    • https://evermoral.hk/upload/file/1631148879.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137dafd5b166---4328800211.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/gumejabo.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_off0001353a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1353A 10672 bytes
SHA-256: 7732e5434e0232726cdacd36f6d21097c2ae49ffa63359cf504143dea823a930
font_01_sfnt_off00014d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D99 21568 bytes
SHA-256: 84c71eed4f6e418323b97a9824a7e391ff09cb9e7f1d977512cf6987b4c186aa
font_02_sfnt_off000185fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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