Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a0ebc01f19cc55…

MALICIOUS

PDF

74.7 KB Created: 2021-09-06 20:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1bc1d58aafc14b9f7157dd7f3457f5dc SHA-1: 01467fca4d1d06117c7e411f28616cba9b9a9641 SHA-256: 12a0ebc01f19cc557996e7e1a2112d400ae1b77f935ec2638c107aa8da5a3d1e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the nature of the URLs and the PDF structure suggest it's intended to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://oniceh.ru/uplcv?utm_term=types+of+electrical+wires+and+cables+pdf PDF link annotation
    • http://cameralehiep.com/hinhanh_fckeditor/file/34192518505.pdfIn PDF document text
    • http://kientrucsangtrong.com/plus/files/zebeposugufe.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/1d91cd44538af27185859fbba55deded/39156170145.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/35283115997.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/24096000496.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/98183443590.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/85751fece0fce5a72a5b602be3b8acd2/41349668254.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca78641b86---93025228586.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/25930915107.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/rowisaj.pdfIn PDF document text
    • https://fotokeramika.bg/userfiles/file/6579429126.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072419742ce6---lomirubatogamolijozodexik.pdfIn PDF document text
    • http://mega.kz/media/upload/files/nizezinenaborarobenujob.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842baf2e5bc---59431776879.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/4668888624.pdfIn PDF document text
    • https://fiscalonline.ro/app/webroot/files/userfiles/files/45722960713.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b87fceaab---916596481.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/fajofupewowamarotirokup.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/62680529611.pdfIn PDF document text
    • http://wongkungfu.ca/clients/f/f5/f5c316b966f29b3192b3e9e3c5714b3c/File/73672154330.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea06992531---kosasajoropalid.pdfIn PDF document text
    • https://maviet.vn/upload/files/39204267918.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_off0000bf5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF5A 17096 bytes
SHA-256: 262c119cf3922fa4d726e4abaa4c895bb76b9c09d59b179d8e25d8c176cced38
font_01_sfnt_off0000ebd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD3 10916 bytes
SHA-256: de8a01221533fc3981a6b5a37909fb1657fdc03249f66e1652a09d2c2d309130
font_02_sfnt_off0001051a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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