Malicious PDF — malware analysis report

Static analysis result for SHA-256 e203ab7435a100dc…

MALICIOUS

PDF

93.9 KB Created: 2021-07-15 23:36:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c3957960f35ca86939555e45f1a2df31 SHA-1: df96d55cc3a5ed99cf33153e5409268de5e25eaa SHA-256: e203ab7435a100dc92eba6d5b50e19ba516358d6329a538abcb0cc9503a4b9f1
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, suggesting an attempt to lure users to malicious content. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs further support the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/gmlvf5jad12usmg5gd5dpcsal7/pafexi.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/d3b50bfe73ac296a4b0d35fb2b1b198f/47486349794.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b83daf75209---lanagomomikotolatipemere.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16087145c641b5---87036773853.pdf
    • http://slenderclub.cz/ckfinder/userfiles/files/15056104301.pdf
    • http://hattingtoemrerogsnedker.dk/userfiles/file/67925426083.pdf
    • https://mzlpro.com/web/img/podborky/files/32591226665.pdf
    • http://www.trotasierra.com/plugins/ckfinder/userfiles/files/85698396423.pdf
    • http://www.prieteniitehnicii.ro/documente/file/niwuke.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/62b60ef1a848e051e2b3e60d8b2d8276/551178513.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ce14437e5e7---wesudosuno.pdf
    • http://hopkinshigh1961.com/clients/878968/File/32604642717.pdf
    • https://gachbinhduong.com/upload/file/desekorikideximozokakew.pdf
    • https://www.groupenahno.com/wp-content/plugins/super-forms/uploads/php/files/bv49grljl0852n903qt2rloaen/xunewobodapododi.pdf
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/3659adeaaa2c7af18f8adfd6ce58ac0e/domumagazijatibubilalid.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/k2us8e94rn38esi9d3ojo2co84/93541027056.pdf
    • http://solarhomepage.ch/fckeditor/editor/images/file/55823857797.pdf
    • http://goodslib.com/userfiles/files/fapewexuzaxisese.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8c46841a0---64870155877.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160872ccef2b13---36807258539.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075471aa9d24---tixikuwute.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/ehjjf96oi6eg6u5kjqm7v3hj33/kosujudezolanusebogo.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16085dc276f63f---gesovogumikutoxile.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/942c474e7c486c53b55eb0b5666ec994/3624147354.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcf60bd2a2---10816577607.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/608909c69df29384330306bf5e4d13d9/gudetuxusajibipo.pdf
    • http://novichiha.ru/pic/file/bidizuwigukaxobirexafed.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=pgt+english+question+paper+pdf
    • 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_off00010a14.bin
737635e7c3976655f169655ab6ebfe19252ed7f9f8800d88a641b4548a68f9dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A14 11024 bytes
font_01_sfnt_off00012319.bin
1a920c74d7658f1cc3d274873ea3ed469e34ed95936b2c77222ecfce9c65e71a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12319 17904 bytes
font_02_sfnt_off000151ff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x151FF 16792 bytes

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