Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a953a882bd713f6…

MALICIOUS

PDF

201.9 KB Created: 2021-06-28 18:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ab83fea62ea06ebf3bf42130d4037c30 SHA-1: ae8ace509836307ff1a7139c3a92b38442416b22 SHA-256: 1a953a882bd713f6ea90a7a7dd505cd6a10aa36aa06217b0a3a0e47c52245ea2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of embedded URLs and the nature of the link farm suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c5034197f---18356039285.pdf
    • https://aventura-agence.lu/userfiles/files/35572785973.pdf
    • http://garantc.ru/userfiles/file/sijazotubofufewufosigog.pdf
    • http://eltonltd.ru/sites/default/files/uploads/burudeludukopi.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/0584d0e39d217b3e387e725949dd671e/52982804491.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1b2de5158---tozijefisez.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea263efe3a---rivizatotufasusumarajelol.pdf
    • http://phunggia.biz/userfiles/file/kurepupolotaxuvafe.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/7skpcj6n6q292f5q5k5a8ch8p5/jugeruzefajeka.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/5r57mtr01q6vib8svret44fsmu/72992297086.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/2092305329.pdf
    • https://holocaustresearch.pl/nowy/photo/file/82620853790.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/c2dda20de9f25ca3c06a2bff670d8abc/sajugozuwapuvekerevo.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/637229df5c1ddd26c2de69f753d50509/35575670413.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/3aa47b47b88c159a02fc90729ebb9a4e/61061772289.pdf
    • http://sukhabalka.com/files/file/8337138341.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dbd286cd23---rajinomukinaw.pdf
    • https://aterhesseg.com/up_image/file/jonezona.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/03193a82125d60c170709a8dc7e62960/bofofimodexewodin.pdf
    • http://graham1978.com/clients/79565/File/47295867449.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160aa35f07b085---53443866320.pdf
    • http://agendatourvietnam.com/hinhanh/file/fudutojo.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/a5add10ec2d07811dcde3e9c466a0c10/42872459081.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c552fcc4888---20188256637.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/jcleppt99lc6m4kg6kgj8sspe8/36896784800.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=nih+stroke+scale+training+and+certification+answers
    • 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_off0002b722.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2B722 16792 bytes
font_01_sfnt_off0002cf39.bin
0a6bf9bd90c40e3200733708b1a4980f120cdd0fd3b860d384a552d19d5ff6d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x2CF39 10908 bytes
font_02_sfnt_off0002e848.bin
9f007a63e5ea71340b1989ab1821f09dd1c1ddd97b415b380b25d32921374afd
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E848 18044 bytes