Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb02e32fedf75975…

MALICIOUS

PDF

73.2 KB Created: 2021-06-26 01:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: cb1cfcdc5fe8e1dae38e7488214ce92a SHA-1: 4035328dc78d6eb6d7ed18e2b2f145b68905a808 SHA-256: fb02e32fedf7597528c03b6de7f1b31eb9f19d53474065d1580bfc0ea13ae162
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that form a link farm, with many pointing to disposable hosting or compromised WordPress sites. The presence of embedded JavaScript and a high ML classifier score further indicate malicious intent. The primary function appears to be redirecting users through these links, likely to a phishing page or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210502205008759364gzh4vp.pdf In PDF document text
    • http://canphantich.net/Images_upload/files/nitorowenugonikabazofa.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/fevakinoxodabekomogif.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a761f2d7424---54814048161.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/nevepexariluzokija.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/ab2211e2e8e7671aa91fadacd70d08df/55935286180.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/71cedfcadf738c747c890ad560713eed/22311364034.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/jeniwigefoluriwiduna.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/kukosek.pdfIn PDF document text
    • http://tillmanfamilyreunion.com/clients/b/b7/b7385abc5988d1ee605fea7695e3d00e/File/28526352035.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd5b5be1fd---buvivanojerixuliwaf.pdfIn PDF document text
    • http://zuche0551.com/upload/file/91551471417.pdfIn PDF document text
    • https://ahha.az/userfiles/file/73250597270.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8c04cacaa---79778966071.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/c8e9faa7ea08ddc3dc0779fffd6a6f12/18477212832.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/guduvelanirurejoke.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/molerorusegeropulu.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074ca7334159---15981068876.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2aa912be96---nigowefadonivilogulag.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16071f69b703e5---36308339948.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bc930a2c3a1---segijolemoxunolugiroxeju.pdfIn PDF document text
    • http://glenbrooksouth1970.com/clients/1/17/17fc1bd13d5538a69f39d58c869d2fc5/File/63713809181.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=iron+deficiency+anemia+anisocytosisPDF 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_off0000bb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD35C 17024 bytes
SHA-256: 987357b1720101cec44608b3db456c306cb9303afbabbdbb751700d951eedbe8
font_02_sfnt_off0000ff16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF16 10656 bytes
SHA-256: 918ce8ef8ef91b4e217fbdb205b87fa0b9d2542a49521a3a96aa89453bb4f42a

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