Malicious PDF — malware analysis report

Static analysis result for SHA-256 195548ce79f071f7…

MALICIOUS

PDF

87.8 KB Created: 2021-06-30 04:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2cfec9e717096d705449c08a76200017 SHA-1: 294382d6ddd42e1abca3a12f8555d5b9b3577019 SHA-256: 195548ce79f071f74bedf18530ac9c76ca5484b499f044e5cc5854e854cc7427
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple websites, many of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The document's structure and URL patterns suggest it's designed to lure users to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/50029043270.pdf
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/4e13da3342a8decaad363b2074ab42e6/65120613820.pdf
    • http://yangpupark.com/uploadfile/files/kulonaxusenoroxozisufafo.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608104c7be481---27909999025.pdf
    • http://adamlegal.com/userfiles/file/banejesinilifaz.pdf
    • http://gongotour.com/FileData/ckfinder/files/20210609_56553E5CB675924F.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609112be2169e---72943184875.pdf
    • http://uniquecharacters.com/upload/files/doxatabowuravo.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec2e91b52d---63746179005.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/07222a2ec7871d6d88ecad489183e53f/50370478234.pdf
    • https://ltssinternational.com/res/wysiwyg/file/bapekasof.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c699a0d7b---togededawasa.pdf
    • https://cesiedizioni.com/userfiles/file/60908398327.pdf
    • http://fresh-j.info/images/uploadedimages/file/gexadafudumujidifusixibut.pdf
    • http://burchiellati.com/file_fck/file/93633084650.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/kfo6rcntsjcptmrgvt95rd0dbr/difogejodilodilimurovope.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/profia96gq3ffqhgqr5jk8t018/71659574036.pdf
    • https://deesudcoolingtower.com/userfiles/file/74031604332.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e44db9c686---12262515717.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160966bac496bf---zuserijugebupozone.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/a06bad67a9a004fd02258cd62a28263a/nediboxamapafe.pdf
    • http://kasintorn.com/images/upload/files/kajapavurasarobujor.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/8osm1go3ibfqsl2916f72fbqtl/99079305514.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=play+minecraft+online+on+pc+free
    • 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_off0000f465.bin
ff9fe492e6b380fc7e5076f657826291627845e315a05b1ad6ef4ddca7d5976c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF465 16768 bytes
font_01_sfnt_off00012009.bin
e55cfc3150204b32945d9536f93df1c6789d4b1f53515f10ba69306c5fb3ba3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12009 10588 bytes
font_02_sfnt_off00013837.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13837 16792 bytes