Malicious PDF — malware analysis report

Static analysis result for SHA-256 090daae2a27d78c6…

MALICIOUS

PDF

77.1 KB Created: 2021-06-15 21:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a269b27975b9e99b2c88ded39c9f6681 SHA-1: 431afd11fc9d64046793b8cfc73d04a0cb7692a7 SHA-256: 090daae2a27d78c677f10399385f2a310fdd4023ff632cb69360fb0c4b6fc9b0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted from this sample, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://philabc.ru/uplcv?utm_term=shape+of+you+download+mp3+song+pagalworld PDF link annotation
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/c50f3b479174e7ff619eb91d173c3beb/litigiwubiwotelu.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/mozidenilopabinug.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/zoduti.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/11452bdda6df9098782de38f1317a679/82433913730.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b616a59737---67793362045.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/remitalasilanesuxadoja.pdfIn PDF document text
    • https://alirezamirmohammadi.com/images/upload/files/nelutapikazijobutorakov.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/4tie81t86l7s50mplc0v31jq0t/noxodirefajov.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/58004377956.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/5420564679.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/d031f745b4ae3e90743fa74cc24feaf1/56061476606.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/c3sf5ru1ql5os1snrbv9nushu2/napenopopopiv.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b5550f5aa18---67912329950.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/2a3e460d191afbad5fac84af1f9780f4/52156420374.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/bawisavubibizazegorenefuk.pdfIn PDF document text
    • http://alkanboya.com/files/file/%5C/22427089370.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4fce7df1e---67039599268.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/9fe429f13c5c41eda3c0810f40e50957/vonukulajoliwuwirukaxodib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE75 5916 bytes
SHA-256: ae1df4030be3800037ed61bc07220ad5255602a971061fb9c93cbba515fc20b6
font_01_sfnt_off0001028f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028F 10644 bytes
SHA-256: bcf5edea029a3f981db269934866ba43040deb02338310fcf09007986a2f8efe