Malicious PDF — malware analysis report

Static analysis result for SHA-256 8986fbbb1a49d6dc…

MALICIOUS

PDF

219.1 KB Created: 2021-08-13 12:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a5b9d4959690d55a6a0a65d34d0846a1 SHA-1: 90b3753eda399322d3a1672728124ef839e7aff5 SHA-256: 8986fbbb1a49d6dc569715dd065f446d66afc7fdb73a8d91c8c41bb462de79a9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress upload storage, suggesting an attempt to host malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the presence of numerous suspicious URLs indicates a pattern of directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9509

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.
  • 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://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/661d22458cbcee76bc6ecec8f4c2feab/83920328491.pdf In PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/6642227ea6cb7fe26bf3cfb514d005fc/53402019212.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1aabddfd3---kapas.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/83128017709.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/32873376273.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160c254d5dc763---boboboreteritovanalinidu.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5686927e7---xujetelunevad.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/46989999095.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/jagawuk.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/vizorozenesilenuzusinari.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094eaf770e3a---14758439299.pdfIn PDF document text
    • http://meta-min.com/files/37128119612.pdfIn PDF document text
    • http://makingthegradetexas.com/clients/d/d4/d4716c73f098ea79da165a2194b6736a/File/zaxiju.pdfIn PDF document text
    • https://vanphongphampmc.com/upload/files/3414628820.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/foxekumul.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/lobakejuraditumesa.pdfIn PDF document text
    • http://zzliuxue.com/upfile/file///kujujitogojeravezinofuxe.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/23145245869.pdfIn PDF document text
    • https://invest.pl/userfiles/file/matususesazeje.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/rntks0947kvgkdruf46ajq8isg/95215957416.pdfIn PDF document text
    • http://geobigoni.it/userfiles/files/2710216668.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/b355170667901089bfd33f983632ad61/vinuvaluke.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b777d64d0f6---sifugemavagezatovoloba.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160849681b4704---50413936707.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=windows+xp+service+pack+2+download+32+bit+iso+filePDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002de59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002f66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F66B 20348 bytes
SHA-256: f1326a5a0c296b1ec88b51aa84623606e32d906c63f725c94e4714e545d0c4c8
font_02_sfnt_off00032ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32AB8 6572 bytes
SHA-256: 406c0c9d6a3ca91e757a629d683a20a793b207ade2f1d09393cee91908c21612
font_03_sfnt_off00034240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34240 11384 bytes
SHA-256: 26a8b6e7389740ed0b33fa0756dbf977d4cce50cb4fbd2906ff96db96fd34dbe

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