Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a32edc2b2e747de…

MALICIOUS

PDF

82.2 KB Created: 2021-09-04 20:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b6e7ae8dc653192529856f9e08a897eb SHA-1: bc0d8ba76d721fad6170c4ed1889e62193cbb82f SHA-256: 6a32edc2b2e747de5fdcecc5e57fc13ea5624fb684f7fb2ce79743a40d4d3359
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, indicated by a link farm pointing to multiple compromised WordPress upload directories. The presence of external URIs and the ML classifier's high confidence score suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/b3afc33a47601b6f1129f5831a815096/nufuzunapeb.pdf In PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/2744913bc465543b51dbcd9b614f252e/torivexijukotazolurap.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099f9404f63a---subuzixomonanikukupusafo.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc04ddaf3e---73739277970.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/6477bef22e327a7d9ed4f52dfc646da9/wudujupubafasiro.pdfIn PDF document text
    • http://nakakinpump.kr/fckeditor/upload/file/32774244865.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/voxudomejaxogab.pdfIn PDF document text
    • https://gobelsprofil.com/upload/files/91999343227.pdfIn PDF document text
    • https://chris-arnold.com/userfiles/file/denatulutejibikud.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/84188384960.pdfIn PDF document text
    • https://pasarantogeldua.com/contents//files/nokebirogoxatigis.pdfIn PDF document text
    • https://unosms.us/userfiles/file/77657656559.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/c131d7f885cbb3f4e0a88fa486d0ad03/mesapazafalixokevagafo.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c953aa2eb2---nifazajoruduzezije.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71fb4d84fb.pdfIn PDF document text
    • http://zuestag.ch/userfiles/files/totegufukelujizeweb.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/42i56b12h0v01kekfbe80ddfh0/18108421158.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ac85555e6---guseguvotofijag.pdfIn PDF document text
    • http://tokstar.com/_UploadFile/Images/file/vodosamuvoje.pdfIn PDF document text
    • http://atsrealtyvietnam.com/upload/files/66124240639.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/23387371561.pdfIn PDF document text
    • https://reinigungsfee007.de/wp-content/plugins/super-forms/uploads/php/files/ircha9e4873quqg8rh1qr84452/24905207006.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e700991ee9---64490668563.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=bpsc+preliminary+syllabus+pdfPDF 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_off0000dac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC2 10972 bytes
SHA-256: a8f79a18150f41f6ca227ce60e5eed36bde452d736ab8f81626d3b53146a07d6
font_01_sfnt_off0000f3f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C09 18220 bytes
SHA-256: f71a91d89bdbc4f3aca08988f645bc089b11014a7da82fce80324c6b7adf20b4

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