Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0f88ec7cd3ea80…

MALICIOUS

PDF

108.5 KB Created: 2021-09-01 08:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9147e3b531debb04fa75fcaa7f0f403c SHA-1: 02363dc4ecd670c8360ae33d8e08c04a54d489e9 SHA-256: 2a0f88ec7cd3ea80565b8c8ad61e0c1ea41e068f1182fda1bf04710401b688b5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristics indicate that the document is a link farm hosted on compromised or disposable domains, suggesting an attempt to distribute malware or conduct phishing. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9881

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ventiliatoriai.lt/js/ckfinder/userfiles/files/91846486970.pdf In PDF document text
    • https://questyme.com/userfiles/file/bejedod.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0942749bccf51d209fe57449b2355073/5177015573.pdfIn PDF document text
    • http://wmhsclassof1977.com/clients/34196/File/32132974033.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/kemavapovisow.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/c538269b0f5118db779a279614b127e3/76249924566.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/1f3e2dd4fc2006b13f2f896d42933b46/kixefikepub.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/futuxurizasajenus.pdfIn PDF document text
    • https://hopadive.cz/ckfinder/userfiles/files/19870056605.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/87006618409.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b14d87063f---fusonavirobusoreriz.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/c26917a3edc342127e574a9a190aae21/12648078107.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/39796491893.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/5cc9db6fd6c31f1bfe9c2be5d8393edf/jebut.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076373d7b7e6---lepizipidevivexizepuzoka.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/2f5b5709db0e739417eca2612d5185ce/52591361903.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/10748473272.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/4c159ea064fd248c5707fbdf75e1f6a2/rokelaxosovitiwuvikugu.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0c3a44b3b2---visekizudovibe.pdfIn PDF document text
    • http://taiwan-tsai.com/upload/files/44375777228.pdfIn PDF document text
    • https://trade.inter-ural.ru/ckfinder/userfiles/files/60455424386.pdfIn PDF document text
    • http://e-restauracion.com/app/webroot/files/uploads/files/7969672634.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/ruwivavujefefejam.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/raforu.pdfIn PDF document text
    • http://aps-mes.com/files/file/vuwerojufizeje.pdfIn PDF document text
    • http://mistralizmiryonetim.com/uploads/file/47712056707.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=oxidation+number+of+sulphur+in+h2sPDF 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_off00013cf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15506 20024 bytes
SHA-256: 945e92bbb7857d7f4f13b56fa445349ba5ed8201de046b8e0852b1ed4566753d
font_02_sfnt_off00018a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A06 11248 bytes
SHA-256: 7cb3c1b2af819fc6b994dee8b453a010fd516db67a412d0dc52888e04bd2de7f

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