Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0444fd3426125fc…

MALICIOUS

PDF

110.2 KB Created: 2021-06-30 13:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: aca165ca1603ea01451fc464891c3cfa SHA-1: f82962b6743e5036080e8f099b1931a0d3aaef9a SHA-256: b0444fd3426125fc32e6344f9f7d609417f665123ab67c8ad03b813de51315be
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, which in turn host PDF files. These PDFs are likely designed to lure users into downloading further malicious content or engaging in phishing activities. The presence of multiple distinct hosts and a high number of links suggests a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/eb0ece031c88be986f0d4d45f19cb2ba/73629691241.pdf In PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c1189cc5ddd---tisejosudenebizafora.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d62be4cdc---xodagiruxaxulixu.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/t6d0cfi57htf3l9a5l34u88o7g/vafitolukow.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/51c3d48f3790ffcf6c8c842e5fe3a51e/43779362684.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/26112836277.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/ocs7t6t4e9eguq6o34em9ggi56/92823030464.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/sonatidebexoxojodol.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfe7d32348---puzajel.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081cf6cd10aa---78836208064.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d89cb4888---malunil.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843d7b36439---6947375985.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16094837122b5e---54248215505.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/66647513816.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/sufoxevojidov.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcaaa495b6---12829119054.pdfIn PDF document text
    • https://koffiewarenhuis.nl/app/webroot/files/userfiles/files/sajudofujezajamipidem.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/b8ddb09ce5c5b1e2be28162aad393d05/43655982223.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/eeeb2fc9e06aa80f1830fb366e72e016/xokukapo.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/484b3f2c5ae1af7710ca6fd669905e53/55906206837.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/44836543772.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160741cce508ca---7559616305.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/67498187698.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=beloved+with+new+forewordPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C11 10324 bytes
SHA-256: ab3309b4e954a2d72527866dac7ba83454f3991ab4c8fc48c7a9587c5527ff22
font_01_sfnt_off00016349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16349 18080 bytes
SHA-256: 660e33a85b54c4144f0dcf30ec190435c5dae66315c83741b5fd9a2719959a07
font_02_sfnt_off00019212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19212 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.