Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4fce5054ed8eda5…

MALICIOUS

PDF

85.1 KB Created: 2021-09-01 19:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 54230919c45b1ba5b0e43cf449fdf34d SHA-1: 044017d4f212c81289b5a263c1ed45d541000a55 SHA-256: d4fce5054ed8eda5bff1d905e6cbc3e4de7ca9d7b971713b37b975e492640eb3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://archism.ru/uplcv?utm_term=macros+for+weight+gain+male PDF link annotation
    • https://prcomponents.com/ckfinder/userfiles/files/takodobilobadujuraribuw.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3243b0d64---pipolaki.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16096f9088b1f6---daxifibufir.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f267401629---8045605334.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160999120c972d---kavuzurepegu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f1486aad9---44129142237.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/udol4ihqojg3kd262abutma0fp/majob.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/1dbreckgij12g838r6457e9en2/73510696944.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/30854607660.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908d01c88e8---sanofalarirak.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/vuredilonelebe.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/ziwizanowaw.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/begekepu.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/77557540361.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b690de78592---61983904175.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/joxofisapizosivegud.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/0icgas4at5tjb9nqmpifsd7f61/tarujoxuxe.pdfIn PDF document text
    • http://4bx.pl/public/file/20321872065.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/74709a8e640c6016b04a458ef6a9ffa6/81042486199.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/nigeboruzinomoriva.pdfIn PDF document text
    • https://scalping.ir/data/files/file/25184583747.pdfIn PDF document text
    • http://bomtvplus.com/data/board/file/20210618193127.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/45c739dc8b419ed3d2b16ded2b860044/89358484381.pdfIn 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://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_off0000e569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE569 18804 bytes
SHA-256: 8dab76b52439ac0511fbf15282ed07304871948adcc6bec06fa03f7573d71847
font_01_sfnt_off000115b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCC 10864 bytes
SHA-256: b4f3a99430c208f121b28dd5166ba82f5a1d6a2155c53f8ee9c8a70403715507

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