Malicious PDF — malware analysis report

Static analysis result for SHA-256 017e1531fa207316…

MALICIOUS

PDF

80.0 KB Created: 2021-08-18 12:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 45e8e45e6e3f6345ed0ef3f01dadae33 SHA-1: b5c8f7d55699e3871cad7de0253a1d32b2482ec1 SHA-256: 017e1531fa2073168a16da80ba710e856ed896e1e8111864f16b0f4e60d47b2c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to compromised websites and potentially malicious PDF files. The presence of these links suggests an attempt to lure users to external resources for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/2c1be6ed56da654bc5ddc8041728ce79/34842795413.pdf In PDF document text
    • https://my-natural-style.net/upload/files/23380660804.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d92ca84f726---poporidedadu.pdfIn PDF document text
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/luzawe.pdfIn PDF document text
    • https://rubenferro.com/userfiles/file/pibulu.pdfIn PDF document text
    • http://ambcavallon.eu/userfiles/files/97549450320.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/41331453918.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c631e410743---wezowosefesiwelibazu.pdfIn PDF document text
    • https://baongochoa.com/upload/file/nanixizidubevuxi.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/d33877aa72242624de5d1da909d0063e/kisajamofuwivepatuwadazos.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088be468979e---311912408.pdfIn PDF document text
    • http://wamer.org/userfiles/file/65154575915.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4d0a3c185e---87634562703.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/71651218524.pdfIn PDF document text
    • http://dzbnf.com/upload/file///46460792807.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/18588836661.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a62b92ab755---10476984718.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210710131541_148627975.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/77417544946.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/4654697069.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/xevejiripasazamubu.pdfIn PDF document text
    • https://www.geo-decouverte.com/ck/ckfinder/userfiles/files/womaparolawodigedefodojed.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609086d86b2ed---32005328452.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=departamentalizacion+por+numeros+simples+ventajas+y+desventajasPDF 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_off0000d49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAD 17152 bytes
SHA-256: df85d474e9229625623d96fbdbf3acadb03abdea66ea7ec83d11f1381a160cd9
font_02_sfnt_off000117ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117EC 11144 bytes
SHA-256: 9db0ff8823f38f7fcf463a637034bc6aacb704abcc58d89649924720a6118c55

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