Malicious PDF — malware analysis report

Static analysis result for SHA-256 197d47edf4f0de60…

MALICIOUS

PDF

78.2 KB Created: 2021-06-12 21:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c7f3dfbd65c9cce797d0ba721d128324 SHA-1: 9f693fcd932ff90f81c3cc911169c62dd609f70a SHA-256: 197d47edf4f0de60d27dbdda669b8b56c39fba388de3852f2dc5cd945a67c6e0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file exhibits characteristics of a phishing lure, indicated by the presence of numerous external links, some hosted on compromised WordPress sites, and a visual download button. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a secondary payload or lead the user to a phishing site. No scripts were extracted, but the embedded URLs and link farm structure point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://inwebjor.ru/uplcv?utm_term=download+milf+city+for+android PDF link annotation
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/de70c00fcd1364fe3b398dd0dc5a466e/62854860443.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/e86fa92e06ed2785c275e5cb53205ce2/83101116903.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/davelizemosanuzifudarozon.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/2a2b4fc799381890aa8610af29abe801/30787181658.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/ktfqg4omsi86e9g21nkqg66eb7/19640527040.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/bavatedanarulatesigubu.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/vuputem.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0e50cbfb2---bosuzilifebijamit.pdfIn PDF document text
    • https://partner-support.net/user_data/userfiles/files/galiniri.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/ee3d5c81f5b438588aa4b4a5447d8d11/68733602968.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc5e910de3---ketedeget.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160733e634b5c8---31428005878.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/4b6bf8fa420019e63d35b9d8731e20ce/wanadorumoguxalekeno.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/16084d9422e4a0---39343331398.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/kumakipaxatenodogekum.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/6f249d6a4c64a880902f8213fa78febb/melubolelasov.pdfIn PDF document text
    • http://allasclub.com/campannas/file/42717249407.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076933b62ae7---44679479700.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607741b36f973---lirisubuse.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B0 5180 bytes
SHA-256: 8c6549dca74b9130ed7f8b068d8b2a926ae7194b3f47d3072fa19458e75fc1eb
font_01_sfnt_off0001045e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045E 11612 bytes
SHA-256: 316b67108798cb2f9838b1e4dc7a0428742f60b154e4d3c66072dbc631998b04

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