Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2966f950527a9c2…

MALICIOUS

PDF

78.1 KB Created: 2021-09-23 02:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 13abdd3b0e49470ddb8529c3300e1064 SHA-1: cf9f37393fd49c82e588afacb8480046e911623a SHA-256: c2966f950527a9c265f4a7537e9d13dda1c383e16f3e1187ef748ab590ed732d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs, many hosted on compromised CMS uploads, suggesting an attempt to distribute malicious content or phish users. The presence of multiple external URIs and link farm heuristics indicates a clear intent to redirect the user to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://istanbularicilikfestivali.com/upload/ckfinder/files/93869217156.pdf In PDF document text
    • https://idealist.ro/userfiles/file/65584746900.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614024a8bf9bb---19400922647.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/fopiledux.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/03d6010da67010de566a762d8ca2a306/99571028861.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/l26dvcksvmd96kflrp8v0a6e0n/61801397065.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/oeth22q2010645m0i301og0dug/wipepupefitadoropokix.pdfIn PDF document text
    • https://krossi.ru/images/content/files/xagemejugupufi.pdfIn PDF document text
    • https://polytex.de/sites/default/files/15850742213.pdfIn PDF document text
    • http://atrsara.ir/resource/files/gokalibanebudojodan.pdfIn PDF document text
    • https://ever.dacola.com/upload/files/zarabazenusi.pdfIn PDF document text
    • https://jin-ji.com/upload/files/nepuwadikog.pdfIn PDF document text
    • https://carmelocuritiba.com.br/ckfinder/userfiles/files/dewevorufa.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/midajabilosizowozidan.pdfIn PDF document text
    • http://www.beautyvogue.ch/Files/file/gajol.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/virowi.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/duwefugonabapapudunuw.pdfIn PDF document text
    • http://fsf-vastroad.com/userfiles/file/69903600220.pdfIn PDF document text
    • http://studiotecnicostradi.eu/userfiles/files/fijovimivuvepelaxav.pdfIn PDF document text
    • https://impeka.lt/components/com_mijoshop/opencart/image/data/files/famokakajewikoxek.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/8044363559.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/zuvijodaxerubagexakuwiv.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/b959bbb170cc2bf1806fa634d57184d6/57543738522.pdfIn PDF document text
    • http://harmonie-avion.fr/actualite/files/4240030003.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=robux+generator+no+bot+verificationPDF 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_off0000c964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC964 18556 bytes
SHA-256: 104e95c6ce512e2908af76024e81a2eee42f307b9e1bed762e95d40feadcdc8a
font_01_sfnt_off0000f991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF991 10748 bytes
SHA-256: dc7ab9a969ecb574a7a6d9fdca8c3bd6d1b1fae22fb6d87a320ca45389174fcc
font_02_sfnt_off0001128a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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