Malicious PDF — malware analysis report

Static analysis result for SHA-256 48de296a0f2d5c72…

MALICIOUS

PDF

87.0 KB Created: 2021-08-04 01:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 95052213b4c3355425653e5502f2bec7 SHA-1: 593aef026f3d9efb26590696d841ded381e20a71 SHA-256: 48de296a0f2d5c725b65fb5553737e76e7b7beb75c91a3c5da08fb470bcc5376
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The presence of these links suggests an attempt to redirect users to malicious sites for further exploitation or information gathering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://enjoyisagenix.com/ckfinder/userfiles/files/69048744238.pdf In PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160af62a0203f8---vapipelemenupe.pdfIn PDF document text
    • http://sanmargholidays.com/ckfinder/userfiles/files/madopofimunutafexoxarurug.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/jezikanofekutumokisetam.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/tusebamepo.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/ht9l2u7js0aekgj7vsavr8da4p/31510697433.pdfIn PDF document text
    • https://jss-moms.si/upload/File/sejeropapobefi.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/fixobad.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/dc559779482fc6f03b1162a6aff4ea63/tewujovari.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/d5f966effefb4901a86b76380e379aa5/62811070652.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/01jo8d8va6vcmp0ce4utug82gf/relonusabofuno.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/kebadipaketameseje.pdfIn PDF document text
    • http://fd-health.com/upload/ckeditor/files/36811658164.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/at09uqsme6jcdvkoa8ij1h3266/famowuvabozojokobapinuxu.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c0107293d83---vuzabanonufokoditikagojez.pdfIn PDF document text
    • http://richfieldhighschool1969.com/clients/868116/File/mafijujotomonaligixapen.pdfIn PDF document text
    • https://www.oapublishinglondon.com/ckfinder/userfiles/files/42327633230.pdfIn PDF document text
    • https://leifs-auto.dk/images/file/76803205329.pdfIn PDF document text
    • http://kibunajcc.com/ckfinder/userfiles/files/jivapurakigegiget.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/sitifeje.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b925122b12b---rafidaluturopikefosalux.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/189548281.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc02dd85051---99580886973.pdfIn PDF document text
    • https://artbynela.com/uploads/file/zemaxugatatelokufomo.pdfIn PDF document text
    • http://beming.com/ressource/site-image/files/71599473455.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=mamod+steam+engines+for+sale+ukPDF 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_off0000f119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF119 10884 bytes
SHA-256: d2c08336d9e309ba1fcd77fe9bd9ef61ff953d1ecb94d28bf8bdb44a540e9853
font_01_sfnt_off00010a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001221d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221D 16648 bytes
SHA-256: 4e8cd1a6b65dde5dac109296126eaae23676699effcb682e7e8872e4c56082de

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