Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f2eb0620fcd84c2…

MALICIOUS

PDF

77.7 KB Created: 2021-09-08 01:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1d020124242d563f6912b219968f3e92 SHA-1: d1578c0ecbbc662d9190fa3095456e11544cc2aa SHA-256: 2f2eb0620fcd84c22d06e6883f3338e1ee0b6d3eb8908b1212347f9924625e5f
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to compromised WordPress sites and utilize UTM parameters, suggesting a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://medvor.ru/uplcv?utm_term=ewon+flexy+103+manual PDF link annotation
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611eaf914592c---madukujanonawebekew.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///nofif.pdfIn PDF document text
    • https://springkasteelhuren.be/userfiles/file/17032090507.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdef0ce16e---26026919449.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/d342ec3fa4f6f042233715964a11d8f8/13877538637.pdfIn PDF document text
    • http://armanetti.com/images/83676433309.pdfIn PDF document text
    • http://studiomistretta.com/userfiles/files/xenodotedu.pdfIn PDF document text
    • https://vgi-vn.vn/app/webroot/img/files/82881773910.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aedd11e50f4---12250385079.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/bekatawikelad.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918dce74ea7---60644583243.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/44539888207.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/73a5ed20ab26adebe74a6a9b18306dba/56960771975.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/zafizikozewuxelaxa.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46528d27af---97563405517.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/45970467527.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/26263973992.pdfIn PDF document text
    • https://triosms.com/userfiles/file/31817139761.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/mjaj5jhc2k9j24bh0qbu1p5763/tevinofiv.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/9a870ce629b73dd9098b721769b6ff5f/wabibojizobupuziwufil.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cee43dba993---delakam.pdfIn PDF document text
    • 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_off0000c758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC758 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6F 10648 bytes
SHA-256: 2d11ebfebaa250d5007c2087cbbd6206049380bff0551bada108ccb0e5b13b90
font_02_sfnt_off0000f7f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F7 19088 bytes
SHA-256: 7a3952133638fd85b64cb045052d846a3521080c1d809a9f96dff0de714563bf

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