Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c0fed8d07fc10c…

MALICIOUS

PDF

77.8 KB Created: 2021-09-03 10:34:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 17e6d34202f7ccd8f0de709e9cd7a72e SHA-1: 7984df65ea23c3e07af5b7bbcb3e3a275ea7b36d SHA-256: 29c0fed8d07fc10c9f8fc58b750c579aeafee2c45b3442cad90a76189dbc21a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress upload directories. These links are likely intended to redirect users to malicious sites for phishing or to download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612003ec4fb7d---63294028300.pdf In PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e7457157a---82738052851.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/88186458809.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2c9d0d7b6---9097635512.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8b4577111---99337101674.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/a51cb0bf2168b99654bf859be4d066a9/patadalolexiniretu.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/xogokajedasixureda.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/74021986610.pdfIn PDF document text
    • https://sona3elkhair.com/userfiles/file/10405413695.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/repukin.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/97375176793.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/6768880034.pdfIn PDF document text
    • https://maclashoes.it/file/gevobixu.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/uiqo3ju8qdrur19er5hnjhg1mp/91840753488.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/jonaguzavu.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16106b2e8573ac---97911218926.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6466588eec---vutugoko.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/063e71c874344807b1e5523dae0f6cf8/luvajudedobugasivugez.pdfIn PDF document text
    • https://ottopianos.nl/files/rugeporezivejipivevifo.pdfIn PDF document text
    • http://ipllaser.in/uploads/56800706474.pdfIn PDF document text
    • https://www.nstoplana.rs/ckfinder/userfiles/files/81068777371.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f4d7c5d5c---12760124053.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=grandeza+vetorial+e+escalar+pdfPDF 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_off0000cbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF6 17508 bytes
SHA-256: aa2799abf4b23ea4721fdba0093f22993d6ba87e7542cb492f9029bf990a619c
font_01_sfnt_off0000f8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A1 10780 bytes
SHA-256: 896e0c07c50683814c202dc052eba890bfb241cbb1634b3b4511ac507e743641
font_02_sfnt_off000111a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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