Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe5d94eb5637873…

MALICIOUS

PDF

100.1 KB Created: 2021-06-27 03:36:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 42314cd14920b1c1bba17e2566f6a84e SHA-1: 414b91c449089eec562322037a991b7ebc03577e SHA-256: bbe5d94eb5637873cc3d6df4d59ca7c545d46872b031ac6f957d7ff1545fd2e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

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://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ee6b79075---30998128546.pdf In PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2d5c42e99---bagalowubosibugeperupa.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc239645b1---pamumevegajewixe.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d1647e1b5---14945571749.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/5b1468de25b64b9e9e4b6f32418625a3/bagazu.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/4910160ac2afc6d1ae5bb2e20910c322/71294797384.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/kezubovirodixokug.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/12460159541.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f9fc9c265---90909785828.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079bb0d51e66---xulofafi.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/2muj4e8atjj9kelvlmbo63muhe/54837595971.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/5vgs95ahpf4cbainn2gp0eee20/pijisojivesuxotuz.pdfIn PDF document text
    • http://wagnerfamilyreunion.com/clients/866685/File/zojipomo.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/28l6gr554dm4bnnfgku01gb0k6/vezawibaxofimi.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16094566b40d69---bijukuzid.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/72127278636.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/pifipuputidad.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/jndgm9jld6krthagn7jreqe5a4/gifokubopinopitukili.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/304ad535351c249d353bfaa17c064780/23993458245.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/317c011dc52c71a4b5a43a9835238cfc/47439664217.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1606fce2dce935---bugumodubiruwizineredikuf.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48a7fcf347---44470550924.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/falusifamatafa.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d68dc33d8---10120062832.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=meaning+of+breechesPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39D 24016 bytes
SHA-256: b13cf90a76062829f07b65745b8dbcf2a52035c8ec0380c31819ca0b1ad5f6f3
font_01_sfnt_off00012d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D97 10604 bytes
SHA-256: 2a248b2a9892c9e1f5b5e20bc1c0d3497eb962abcf3a145272796dfea5fc97ab
font_02_sfnt_off000145bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DC8 2388 bytes
SHA-256: c9e40d9c66562fc4b2b9da863d83ebfea74c3edb78c2a61126e3eeb9c74cdbc6
font_04_sfnt_off0001683e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1683E 16876 bytes
SHA-256: 17f7efdc105ce1e341001aecf285be49ec47fcd519452936727a87ed73df54ce

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