Malicious PDF — malware analysis report

Static analysis result for SHA-256 4530d2c1f2040386…

MALICIOUS

PDF

87.0 KB Created: 2021-08-08 19:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 464daf7e5f511ccbfc0777775bcf42f9 SHA-1: a89592467c124539c7c0b97e9bb171c9f9582696 SHA-256: 4530d2c1f2040386ca412c22d1af74898dd4185986813016eea3082bda1518f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to disposable hosting or compromised CMS uploads, indicative of a link farm designed to redirect users. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The embedded links suggest an attempt to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/0049c50039176a8cc0ef0d418a202691/50240557517.pdf In PDF document text
    • https://cleaner.pl/userfiles/file/58076359055.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/50973060499.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e45b1913ae3---55927087296.pdfIn PDF document text
    • http://test888.org/uploads/productsfiles/20210706052127_e308a.pdfIn PDF document text
    • https://argumentua.com/i/file/gaxiwogotu.pdfIn PDF document text
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/podifa.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f1cdae6c8fd---lokabobibigimepikikib.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/watorabawetujod.pdfIn PDF document text
    • http://coumert.com/images/file/gonekiroxobazeroras.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160a4439406aae---71938529163.pdfIn PDF document text
    • http://cdhsalumni.com/clients/28864/File/dafaxorali.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/98973784216.pdfIn PDF document text
    • http://chamdure.com/DATA/files/9690865393.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/rininejo.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160e2e4ba56fcb---xowuj.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/dojadibofezeb.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebf013b63d---83506906858.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/wafefokedujamu.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e0258e547---vefatedeluful.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/2c9c4c6b054e607dabc6bde5066f4628/61604034930.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607942f5a6dc0---tipukeforawa.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/lefezefujavuko.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/rasadekeniwewavidogofiz.pdfIn PDF document text
    • http://giwajib.com/ckfinder/userfiles/files/52435250014.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=cheats+keyboard+for+gta+vice+city+apkPDF 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_off0000ef3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3D 11192 bytes
SHA-256: fd1ebc8e7bcd4b163e0d8f3abfededf75d066581788d1fac3c4fd2f898dcbc84
font_01_sfnt_off00010947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10947 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12159 17348 bytes
SHA-256: d317dabaa9608d6ab384a8507576ab4c12cfc4b6f8032425227d8c92353888a3