Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9e449876e462137…

MALICIOUS

PDF

107.6 KB Created: 2021-06-28 15:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f0232ae9f6edf849484eae0d3e893fdd SHA-1: 1398567a75b77a4ad04ad3dbcc73fbd76900b93f SHA-256: b9e449876e4621373721b7534935b587933eb5f3b663e520c0e7d33747edda32
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://medvor.ru/uplcv?utm_term=jack+russell+and+poodle+cross PDF link annotation
    • http://cc-loges.com/uploads/file/wemudup.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/fegisebojibabilume.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608b154a86dd9---xelimesa.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/57456605593.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/octg5btt1bh7c0qb21rfvt96g0/75780715954.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160971b9f9bbf8---60294715917.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/21a326bb7b78ec23785a4237067abfbe/7437283081.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/10996838721.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/nawozejozofesowewijofoto.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ead86d5dd5---55770743408.pdfIn PDF document text
    • http://ithaca1962.com/clients/41687/File/13586552037.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/31652770705.pdfIn PDF document text
    • https://invest.pl/userfiles/file/9567732151.pdfIn PDF document text
    • https://manenshop.com/upload/files/64947580833.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/4def2b618f5481cd8dd729a7f41ec005/nuwitimonigube.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b80c8fb74b9---4211284093.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/6168960420.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/batitu.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/cec2efeed7ad95ef02d116d13909988a/bazijobijilatolofu.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/tedowivegimesesemitogub.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd99378a7ba---widapezenukuwozuzokenelu.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073291b9d5f0---xebetadukiliviwulalokag.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B95 16520 bytes
SHA-256: 17dab69886bbd3ec2a6b7f0b1d65c3601f0d4afd9e3fe3dca6a26fc3206f9cfe
font_01_sfnt_off00014218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14218 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A2F 10500 bytes
SHA-256: 3abe71867e66203e5235d2a6beaf9907a86c13103adf779bea508f92a11427f5
font_03_sfnt_off0001722e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1722E 18020 bytes
SHA-256: daab5c1c163fba2effb3ef560cc8ac07948d2e64870d39d5cc401bec1fdd2a8a