Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2fe326a2e356e7d…

MALICIOUS

PDF

84.3 KB Created: 2021-09-02 04:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 109f25da856e969f1fc22d574894d9b4 SHA-1: e91e47d21362b17b1dfde94d3736f1bde0361204 SHA-256: e2fe326a2e356e7d4c8346aa2fef0b8fec9ff3359ec1e27fffbcdddab32bbc96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://coretry.ru/uplcv?utm_term=how+can+you+tell+if+salmon+is+bad PDF link annotation
    • http://filatelianumismaticaumbra.it/userfiles/file/vezajolofarolirepimidaf.pdfIn PDF document text
    • http://whewfamily.com/clients/12004/File/demilalimel.pdfIn PDF document text
    • http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/96664923574.pdfIn PDF document text
    • http://zimaletto.com/uploads/file/xunoxolukadotorosor.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/e7qoqo5la7d1eomn02d976ri97/40425789408.pdfIn PDF document text
    • https://menu2uplus.com/images/file/mupenobugejisiza.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/tukurovidosigeko.pdfIn PDF document text
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/gorofosu.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/pupim.pdfIn PDF document text
    • http://axi-hohenstein.de/userfiles/file/8714682193.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160982ed415bbf---lanuziba.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/mumelinenuz.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/zekanafajat.pdfIn PDF document text
    • https://e-room.co/userfiles/file/87564620131.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610bd9f14ba90---mijigivi.pdfIn PDF document text
    • https://kamarkosong.com/contents//files/vusebomidugela.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160878cc32162e---65142620990.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/kadefolilef.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/80529950272.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/a89203f1ed6d65e09aa7ae985e86ca53/77479633677.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/ee3b72e1fd166eb4adab43d8f329b18d/41559704823.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/fukupani.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/rerudanuvatanelamokamuf.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/e2mddo6mefg67ffnmt5n8kafop/44883553775.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_off0000df8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79D 19796 bytes
SHA-256: 7c8a01da0dbd412a9c427f5d055cd83c186a928be5c9aa4ec9528ba6c49fc086
font_02_sfnt_off0001298c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298C 10968 bytes
SHA-256: bab16ad5f0e1f75871ee31403d4a5985b0faedc8773def328fcb46aaa38c71c8

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