Malicious PDF — malware analysis report

Static analysis result for SHA-256 a03fb049276d392c…

MALICIOUS

PDF

134.9 KB Created: 2021-07-04 04:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6c319eb6e126a9f2efc520aa10dd39d5 SHA-1: 64849e599975c5ed44b9a6c50c0e8c1d562b4235 SHA-256: a03fb049276d392ceae971d1b44ae0e47f5e00df5ac4e46e4775a52accc77d0d
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress upload directories and other disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or SEO spam. No scripts were extracted, but the structure itself is designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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://ucity69.com/clients/861769/File/fuvonevadi.pdf In PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5b21f21d2---97407132310.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/pusopoduwusonexojogagej.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c79efb1898c---95291376080.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b03ecdf2d31---74140727014.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/9dbf5d641245df3554814274bd3d0cc3/xukuserulamabonazotutudi.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/cdbfeb368c117250bcc1ef45f1570659/19186499499.pdfIn PDF document text
    • http://honda-vo.com/upload/file/90052184001.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/zexasegifefetu.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160756011a05fe---barijanetakujanuvon.pdfIn PDF document text
    • https://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/jufvf8mf4crej5tnc2nurqkrtq/xokugomajuronexuz.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/gogeliweregamebezugobigex.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/vawuxenifirenije.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/jimodirofalerero.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/go0mlrnjikc0am8hl7g90gt4io/detokutalotovulibavunatub.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/dbb563953e8d34ee2a301feab13a1fd1/kibodejasuxa.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/b89sm2l7uha95l3sr557bqvbfg/18310886572.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/89e7534134824c896d90f6c244c6d00a/96070521364.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160814c3688f07---8801657868.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/gobidaf.pdfIn PDF document text
    • http://slsnn.ru/content/file/fupodofuteronebotu.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/13949091171.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/faa4df14d6b5b9bad715ec04ebd87df2/6309371539.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=nm+to+inch+pounds+conversion+calculatorPDF 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_off0001b22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B22E 10920 bytes
SHA-256: f3c78d2ebffdc198b89613f66ef0c2160c011ea68b0a53a9ed05cc7958394828
font_01_sfnt_off0001cb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB43 16484 bytes
SHA-256: e074363b9a2a698dd52d3f4c6d1a8140f2330c2d73347c3af347067a2e52fb16
font_02_sfnt_off0001f614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F614 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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