Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc60cee17c5975e…

MALICIOUS

PDF

70.3 KB Created: 2021-08-14 21:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 72b51dbf95bedc421ce8b50dbae3ac11 SHA-1: 0d0baba3946611cad7ead3c9ffb0f623a4b1a0d1 SHA-256: 7bc60cee17c5975e8102eced0cb7d46508e466db8d40fb052a46baefb789efd5
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of link farms on compromised CMS platforms suggests an attempt to obscure the true destination and leverage legitimate-looking infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1606e280927e4d---jimefopekalagalewabotud.pdf In PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607402b36899d---lixupumar.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/buzivij.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/pabodupikuzakaw.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/gejesina.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827de45bd25---rajoberibifivuluzow.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/47972797208.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5e3e893c1---64778108135.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/taromefeja.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/76533582711.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16070dead1f445---bolejudu.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/748503871.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a63b82fd4---sexonul.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/xejapoterago.pdfIn PDF document text
    • http://sbkf.org/files/files/fexixivezujozo.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/35461615143.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/migebuduwufavolupubof.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/853f6b83b55aaed6565adb02ed420c53/gawabejetutogulilabiv.pdfIn PDF document text
    • https://vinacomvietnam.vn/uploads/news_file/rudelosatokizaneruwujapad.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/pirefex.pdfIn PDF document text
    • http://scro.ru/pic/file/pukewegajawowigexibu.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b4deebcae52---xudupijot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+change+target+temp+on+ritetemp+thermostatPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5BB 10852 bytes
SHA-256: 1ad1b42e5417fd85a5a9cdabd8555957bedcaf82775f1a4fe082273ce5a6920c
font_01_sfnt_off0000cea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA3 14408 bytes
SHA-256: 516069fcca41be2aaebdca74d35ead39fcd80dd30e30f1e8f2845b981a747ec6
font_02_sfnt_off0000f2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.