Malicious PDF — malware analysis report

Static analysis result for SHA-256 293bff6671e7899a…

MALICIOUS

PDF

79.1 KB Created: 2021-09-02 19:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 37ab1541a9c162272b5fc626cb5d249c SHA-1: 96ae8e54d1285469739d536a640451e728a41a82 SHA-256: 293bff6671e7899a394aec7ca90587cab56371f41a7c5c16100db4880817fa29
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://nomylo.ru/uplcv?utm_term=con+safos+chicano+style+tattoo+art+pdf PDF link annotation
    • http://anhuicrew.com/upload_fck/file/2021-5-25/20210525072354782964.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/zilivajobof.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607496fb25e97---66256536514.pdfIn PDF document text
    • https://iskoruma.com/upload/ckfinder/files/26447129937.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/xurawojudodi.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/08nrr30mv2ahihiojfgggaao6f/xuburusolefazafebewimagox.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945684abf8d---xijuganupare.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/43400480495.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/worapurikozavelusuxuserur.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/phtl1ccmrpdpmsb0n0uaeglnsk/71361578411.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160bff81b046ac---83654681709.pdfIn PDF document text
    • http://prestopc.it/upload/file/remixamuk.pdfIn PDF document text
    • http://perfekt-dom.pl/designhome/admin/userfiles/file/48109985015.pdfIn PDF document text
    • http://tai-group.com/upload/files/jixomuxawagotojawezafi.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/rusakurekuzuniwozel.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/161173fd044ae2---diwogisugikomun.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/81316191535.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/lolatulokonoside.pdfIn PDF document text
    • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/pepuvirunaribonej.pdfIn PDF document text
    • http://gloria-eurex.com/bisukuvugigajuxapujili.pdfIn PDF document text
    • http://sme1970reunion.com/clients/7/78/786f1e38e9ed540b4a7d4f5dbcc09398/File/didesijotiduvusejule.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c751ecb666---87414087420.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a258092f049---pixokudaburomotakubime.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecebc21860---vimonibapozolu.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/17a452f4e750b8f2b8d1499eb2c45195/madedupugamutipojojefon.pdfIn PDF document text
    • http://dymenahealthcare.com//upload/fckeditor/file/jitozusirameme.pdfIn PDF document text
    • http://davcpundri.com/css/file/moxaxedexuxifa.pdfIn 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://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_off0000d0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AE 10864 bytes
SHA-256: 24de8f927052a815bf267afe2bc3776b83374cde3f9b33ac8cfa66ee1f320822
font_01_sfnt_off0000e9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C7 17440 bytes
SHA-256: 3b56faca9cb389e56ce433b941d0eb07a21c08648dcbaa410c5b22881c93dd05
font_02_sfnt_off000116ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1