Malicious PDF — malware analysis report

Static analysis result for SHA-256 73701cb6c289b9b9…

MALICIOUS

PDF

92.7 KB Created: 2021-08-12 04:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0a814f46b9148a4ced33e69b15bcfb56 SHA-1: 5a5692d2f7b47d23b04cfaa8ea3fac81515a59f6 SHA-256: 73701cb6c289b9b92c57d730348cf02cf61c7322b79afd85353b7d1479fb3acc
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 numerous URLs, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://colegiosantarosa.com/uploads/imagem/file/jidofuwakirovigezuwon.pdf In PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/f488f10e03af0b320acf7c603d09a665/rowavilin.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f6f3c08c6cd---78650207397.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161127145069fc---46831968059.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/24533394543.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/54075781437.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e67bf1d606---68962871198.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/xojowejisozerorixis.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/bixinibamujexovagaxem.pdfIn PDF document text
    • https://vhssirimpanam.org/ckfinder/userfiles/files/wujibisujaku.pdfIn PDF document text
    • https://pielinks.com/UserFiles/file/diwofipopaxe.pdfIn PDF document text
    • https://indiachristian.org/uploads/files/29481744892.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/102f9bc1e9b4b58250f6bac5a51ede60/sefilazexabanavuxek.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/movirovokinanarerexiva.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/8712c48d8008bed5c0aa79a378f70dcf/73538645068.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607893f522902---87299924890.pdfIn PDF document text
    • http://erex.hu/upload/file/kedufafexatilavo.pdfIn PDF document text
    • https://temahr.hr/files/jotikakos.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/096006976c97dbbace23a121c286d22b/babaturup.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160982c16c1b4b---nerididape.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210703_C18A725AE048103B.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/kavofurigamanavamos.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c9306eaa0fdb79956feb4f705e768652/rajigabujewabusu.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/dinevipasolazamogil.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/a78e69ad303c0d57a57e219851cd812e/99270914764.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/kufivova.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/8b868f774c4590a7da4ba1b68980bdfd/24772772708.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+many+carbs+are+in+starbucks+almond+milkPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001040f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C21 17136 bytes
SHA-256: 27942865a5d474d758348b6999f8e161b849bc329909da3d515ec3450e3ff513
font_02_sfnt_off000148f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148F1 11056 bytes
SHA-256: 8e9fbd5c8e5d8b86cc40600459612cb0c6523a230af7f9626dd18f1dd4cdc77e

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