Malicious PDF — malware analysis report

Static analysis result for SHA-256 58a0c5a5fef89c9d…

MALICIOUS

PDF

88.5 KB Created: 2021-07-23 15:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9b8c86e7cf38b77e91d641626c23a92e SHA-1: d5abe3e61bb5512cf35b5194f625c2d23a981090 SHA-256: 58a0c5a5fef89c9da7c23434279810f59671ef829a8065c8d08af7992ea4b3e9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing or link-farming campaign, with a high number of external links pointing to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the structure and numerous external links suggest the document is designed to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://pacpartner.net/images_client//imagesfile/jipuziwigapapenuda.pdf In PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/tt22cd6ujn001705adtmge8dir/40322459243.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160867acaf0798---pemisukezemufaxinomo.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/6c6889937f91a0858d797e0a2d6e8d2c/tolawomevokafofosofisuged.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/kanujexuvapavajikusoxugit.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/suxujosaroza.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/57669eeb87659f1cd248c553e2311e11/42739941521.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/79790b449528bcbb1fb801af467129ab/mamifiwogitexowonitizajuz.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff5ee9cb61---tafekugowizikavizezunoxap.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/98740501313.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/b441a6042616ffb0fe8876e1d318c7b1/94446199074.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/85b91a041ae4efb874b9386b0d6582c6/98344434112.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/17fc273d79b543c10da65d4bb0573c21/berar.pdfIn PDF document text
    • http://polipack.ru/content/file/wemapa.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/f08386dffd8314eae12664481c9d5d86/29145250667.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/fgfbr36a710q7p50ltn93rt3fu/1419453450.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/942431e9baac9af21c00a09c0c68867b/korebeloxoponez.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2612c83622---53736975418.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/6266398379.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/d3ab933ca019e5ba9c75d2b25a70365e/62522239483.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/d30b99db976644c35ef0bd56c55c7319/66270340278.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/62879894461.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/31916985467.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/18492354062.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/54a482aa64d0c107d89fc1c6c2d16755/menug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=command+and+conquer+generals+zero+hour+for+mac+free+downloadPDF 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_off0000f16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16B 18608 bytes
SHA-256: 405c6ab5f3da29daf5a87615e0b4e43915da590d4a180a1103ffb74e9c3de1db
font_01_sfnt_off00012272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12272 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A89 11156 bytes
SHA-256: db1f4fbcc05609391e28797cc945a2be7eabc7bb2f44ca2e162d59d901be78d9

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