Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e369176147866c…

MALICIOUS

PDF

91.7 KB Created: 2021-07-07 02:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: add2e6cf89d836073bd60fe61c6de802 SHA-1: 89666988468e60ff7bd564c1fc30382770c18f9c SHA-256: c2e369176147866c7876aeba4b8c23624bceb8a7c6d14feb2c172e4c053b6c79
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised WordPress upload storage and other disposable hosting sites, likely to serve a malicious payload. The presence of embedded URLs and the 'download button' heuristic suggest a phishing or social engineering lure to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/651a415e290e6b63ce819cefb9086ede/17523772370.pdf In PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/nawaxosadamesofisomuxiti.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210531190019548.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/jejuxosafanigidovivuxu.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e60b7a8a79---tutefinamidigixudekufari.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c8573f237a4---77682674148.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/1c8716ff0a3cd56ddec94e92bc3a304e/96719115607.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078dfc073d29---fuxobabiganatagudu.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96202e4d1b---dexaxosemajapevotejes.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/n8f3kvd0m156j4vvs65q8ehpak/41686391734.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/wisimeluboxirodofejiwuras.pdfIn PDF document text
    • http://flomojapan.com/upload/files/4151806958.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/1a7fe7e41ebb93c86b9cfc8611c0c789/50245610271.pdfIn PDF document text
    • https://shidoremicrosys.com/media/jatuzerezok.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/27448537731.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786a797e64e---voxarifinezedemalug.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160889f655c496---tofilutitifixuloxirajanom.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/hdltt1prln537d6eku8rkq9565/34750909786.pdfIn PDF document text
    • https://mavibusiness.it/file/ganafomovolebabu.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/5c4083bac676fb0168f223fb15724298/97744292212.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/59286374604.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/pudogi.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/480fd77c744b0a5820e9c6440aba10aa/17185221859.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=shankar+ias+notes+on+environment+and+ecologyPDF 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_off0000fd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD24 11164 bytes
SHA-256: 1aba3aec54a30ddfd7747a5ae32c084a22342decc066ab1a6b6aab83ffbb6482
font_01_sfnt_off000116d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D9 18364 bytes
SHA-256: 5ed12039c88f0d53241bb3bf09c82aabc33b56ea7cc8e5f885a9eaa1ed79be7e
font_02_sfnt_off00014773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14773 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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