Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe43e9da7d888b5…

MALICIOUS

PDF

72.9 KB Created: 2021-06-25 15:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d878a1daeb9a5c999df59e05f43b937b SHA-1: 83c175a8c9948c85f41f96833b3b04882acbbf40 SHA-256: abe43e9da7d888b52c67cf9d32b918805791818bbdbd1891ea8e3a056b0869ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to websites hosted on compromised CMS uploads and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7b9a0baa2---60188596825.pdf In PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf112885f1---68970820572.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/c9c4b2a67f3ebf23fdb241117aa63b0d/35597114108.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/pafidizixodajubax.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/68809060874.pdfIn PDF document text
    • https://schmitz.cz/res/file/jarinefilipeguxuwemomijom.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099f54a5befc---70883299703.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/3fd933007c0d44515622024ae7a6328f/13290934406.pdfIn PDF document text
    • http://fotossc.pl/_files/file/futefasop.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/0fc5faf8b660a5489d8178a6b9d67bfe/71973019764.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/bc4240b7f10e4859d2edc68c9d5581af/25312820236.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/birisiwurow.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/katobelisuwifij.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160ae39c96e1e1---20209164925.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/lavasenanumofizedipevi.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849cb68bb45---lufebelurawosen.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/jimogifetovusoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=dazed+and+confused+soundtrackPDF 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_off0000bbc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC5 16520 bytes
SHA-256: f636bea6811d2487e433e8d0765f178cc7cfae85df78eef75bd60a2a9010189a
font_01_sfnt_off0000e695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE695 10584 bytes
SHA-256: f8ce3c3d5691ecc359880bbb57e2e1f24aa661cb71cbf99599f3bd106b5cae59
font_02_sfnt_off0000fefb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1