Malicious PDF — malware analysis report

Static analysis result for SHA-256 d354152895600910…

MALICIOUS

PDF

99.4 KB Created: 2021-06-28 12:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5147ae903cce6c61d9b2f5b765dce9af SHA-1: 8f8f87e3f06541da63ba6fd6da8f3c0fa58b3b58 SHA-256: d354152895600910857f5e55bd29b1c48a6c7b483b9a76ec7237341bde39687a
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating it functions as a link farm. The primary purpose appears to be redirecting users to potentially malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9704

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://lab4050.com/upload/editor/file/zidanomiwuwikuterav.pdf In PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/d06aebe7bf1942df65b93af14497a34d/kamogaxejaxom.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/sepitevinix.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/b52a650a70001449c0b343c5e81067dc/27233263773.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a69eaab9552---depapam.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/97180079027.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/32890986828.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/gsr427m0sk6hatpis30klevb5r/30983578445.pdfIn PDF document text
    • https://activepymes.com/pub/file/kazudelevepava.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/ff1ea8a0e5e1e01e556dcbaa0b6869bd/japom.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a021828b2---76931169306.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/ffe7a0ebad964c8aeea3f9b4f23ba350/lefavofuzed.pdfIn PDF document text
    • http://makingtheturngolf.com/clients/9/92/925d9bae4ecf380f28dbe0e1390c16eb/File/68274746010.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a5701d28c22---zudonazaj.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/4bfc3c7347eca87fdefb9a7d320be895/54653439507.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/55ce1f54615b33b25d2f6fae5af4dedf/45035856541.pdfIn PDF document text
    • https://dascalita.ro/app/webroot/files/userfiles/files/2083489182.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/dosuxo.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/7b4cd1699554044eb021bcf8ef5093a3/vativederusufu.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/87393696994.pdfIn PDF document text
    • http://yuha.be/_files/file/2899507455.pdfIn PDF document text
    • http://gryfarmerskie.pl/pliki_wyswig/files/67589316748.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8244baef9---midivekovomuwaxonid.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/pujoru.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088291be04d8---maradidanezoru.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5ee5b558db---woriwozujeku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=dua+after+waking+from+sleepPDF 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_003_off000110a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x110A3 23828 bytes
SHA-256: 6afa7d4a13034a47f75231937575a2e73b3be014239ab48d94c5047e03440ab4
font_00_sfnt_off0000f715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF715 10980 bytes
SHA-256: 05a79d80c04937a14adbc3124816c454d7ac9fff12c6c1103154e3634b73e2f9
font_02_sfnt_off00013afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AFD 17600 bytes
SHA-256: ace352f381cd26cd02d515905196c38f10672d4e24396b19127b58533c99e59a
font_03_sfnt_off000167d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1