Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d675894605b8e3…

MALICIOUS

PDF

98.5 KB Created: 2021-07-13 18:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: a27ca0984afadf1f89429a598aea8e1d SHA-1: b0acb5eeb83d9219966be715af5c80da952adf60 SHA-256: d0d675894605b8e390d73e2f4559544c20b7c82b81227f12d7b4dedc0e7bf619
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS uploads, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing attack designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0c55d07aa---59391578087.pdf In PDF document text
    • http://tksvolga.ru/userfiles/file/2806834930.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/fc250227d3ab62dea0fe34198a0a315b/99475291205.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce6928c6b75---wedujifisekuxase.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca62a43532---52312485544.pdfIn PDF document text
    • http://df-2.de/images/daten/file/3202672337.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/zojotabuvel.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/bf5baed1b145cbd991be007fe456a74b/70734234412.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/3fbc5066a66e862a3a7b425ec22a2bc7/dopemojawedi.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076c91583df4---nanufatutixebivodogexola.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/5c51315f99335e78c4028f44a903820a/21744500384.pdfIn PDF document text
    • https://abeess.com/userfiles/file/wofipagupinuvir.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/62955836647.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bc87f31fd9b---29145151727.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/fafewesaruduwi.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/77463797132.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///55980180290.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/ba69e3b8d7c488d1790eccd61bf59a47/bamawixavejusa.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/degedagulisativikoz.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/bf455257170c8915a2cd3279de9e7ff8/35750098022.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160e90765b8b9d---titedebanufutuzenod.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/426a29fa54998d27a1a3b4d70a71d190/71030677310.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=power+theorem+worksheet+with+answer+keyPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000148d0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x148D0 19476 bytes
SHA-256: 102a7cee0825320650f6244038b2dc1bdab98c194db521bb0daf3eed2700cafe
font_00_sfnt_off000102f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F1 16164 bytes
SHA-256: 8599359936e3e834cf56eb186d614a000990a3a5825701cf32eb5e21364d619b
font_01_sfnt_off0001187c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13093 10620 bytes
SHA-256: df4118502fc8d6da2d2e0456a5ce54bfbce9ea3a2f10506cde73a89cbe6ea8c2

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