Malicious PDF — malware analysis report

Static analysis result for SHA-256 7000f3a722780207…

MALICIOUS

PDF

82.5 KB Created: 2021-08-15 22:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: d0dbb56b7cee834bbd5b8a5aa3f7792a SHA-1: cde6836dffd12292b4738b513eff0b9c7a633cea SHA-256: 7000f3a722780207f6f4222b02a269ceb6baec7690231059b7e04cfdb857cd02
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to potentially compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the extensive use of external links suggests the primary attack vector is directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://crewmak.ru/uplcv?utm_term=share+chat+app+free+download+punjabi PDF link annotation
    • https://safrano.pl/userfiles/file/nimixinitezewirow.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccfe8bd2de---63951547231.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf58778ee6e---widabosakurane.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8afba7cbfb---78989160391.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/jsro2ehdas6r9vjoro0e934kln/91247816050.pdfIn PDF document text
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5808ddb61---5379332952.pdfIn PDF document text
    • http://brenderup.ro/mm/file/movujekagubetajomodid.pdfIn PDF document text
    • http://filtrydokoparek.pl/img/all/lizakulozemijunuteruxaz.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/bb26ef2e0eea1ffc79ebc40ba1e3a0cb/53934717544.pdfIn PDF document text
    • http://titusrelay.com/clients/e/ef/ef304ccc03541e9e6382bef5f13b0a7d/File/vukadobuzenaz.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0aa6a429df---nafamosakejaf.pdfIn PDF document text
    • https://fotokeramika.bg/userfiles/file/xokagabuwejituk.pdfIn PDF document text
    • http://drxzhang.com/userfiles/file/kaxatewusilovuxijimixavit.pdfIn PDF document text
    • http://fitviewer.de/files/file/47750329986.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc4ee61698---72917243968.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/83558378045.pdfIn PDF document text
    • http://capital96.com/userfiles/file/solajodekudev.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/85203a492257751c6d0bc2914e705bd5/diguzalegumubupuj.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/sulikodisuvokufa.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607037030f361---fuxubexogagogukata.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/a069be688ca432f2187cb24fca69d259/79177156049.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/69842494072.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/jajadobafupib.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/a43653ffff8412966d7534cd723184fd/zokusuvomizowixu.pdfIn PDF document text
    • http://zhouzhuank.com/v15/Upload/file/20218141551521437.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4a07b7282---junasufowi.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_off0000deb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB8 11080 bytes
SHA-256: 677ef582728fb69f53101d16600cf4beca9b093eb8441ab2c92a2451dabbec34
font_01_sfnt_off0000f845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF845 16732 bytes
SHA-256: 92a8f96313fb50b05b29c7117f63b529eef5fdd383b5ab38f507a287fdd285e6
font_02_sfnt_off000123e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1