Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fea12f7fc5bbc6f…

MALICIOUS

PDF

71.9 KB Created: 2021-09-22 16:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6ce5e82bb1e91c96bdbdd96a98c019ba SHA-1: ce1948d270c669bf71bec94fddaec5f1561c2f22 SHA-256: 8fea12f7fc5bbc6f7dd7b2dbe6a7e1d229a349ae64ddfe28430c7cac09b142bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple links pointing to compromised or disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure itself appears to be a link farm, designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://takitech.hu/userfiles/file/telamifixipaguwojipowexek.pdf In PDF document text
    • http://blackhorsesc.pl/userfiles/file/61378241987.pdfIn PDF document text
    • http://clinicaveterinariasangiacomo.it/userfiles/files/33442474156.pdfIn PDF document text
    • https://alcc.c-zentrix.com/ALCC/mail_attachments/multitenant-ws-01/1/1632097441.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/godikubaxewivojorezalaj.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e8494c8cf1---70445485884.pdfIn PDF document text
    • https://bushregenerators.net/userfiles/files/79002405743.pdfIn PDF document text
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/gikepevuxem.pdfIn PDF document text
    • http://ayrh.internet-match.com/upload/files/24113860926.pdfIn PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/16078348518.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/tuzade.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/22701531762.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16137e7188efb4---7279776693.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/veledepususadaviputan.pdfIn PDF document text
    • https://skiclubraonbaccarat.fr/pdf/18564830746.pdfIn PDF document text
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/49074900850.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/kavawewimesafimife.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/17468718824.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/dimamabujisozumiw.pdfIn PDF document text
    • http://sibaco.ru/ckfinder/userfiles/files/12774260758.pdfIn PDF document text
    • http://sarna-zapiekanki.pl/ckfinder/userfiles/files/30552833748.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///29949432374.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161369ac5615a7---79241576677.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=where+can+i+watch+the+longest+ridePDF 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_off0000bb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB91 15060 bytes
SHA-256: f58ccbed403eb3264e0571a447aee85d0a6f5ffe702f51628f6c4d8df2620455
font_01_sfnt_off0000e1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C2 10728 bytes
SHA-256: 67ce5efc47fdda30e2430a782b4eba8d5a0cac17e582bd62fc4cb6623d3de341
font_02_sfnt_off0000fa37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.