Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f46fe4f61cec382…

MALICIOUS

PDF

79.5 KB Created: 2021-06-10 12:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7419082545b40e5112a7425928885735 SHA-1: fff4d555d8a791690932d3376d4397db1ce1edc4 SHA-256: 7f46fe4f61cec382e9e52daca5cb188d5002818eb9e9d53d43084e272b6d5899
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious by ML and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress sites and other domains, likely to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains text related to search terms, suggesting a lure to trick users into clicking on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://oniceh.ru/uplcv?utm_term=sivapuranam+lyrics+in+tamil+with+meaning PDF link annotation
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0e74749f3---jidawe.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/56029298251.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/9jijhm4cddr6b8hlshse7i8fq2/tebazixirixenadifidudabuk.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/nofegenomujagefodavor.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/98858472931.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/31850024d57e12624089279dfe638995/kixebunawemaduz.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607426ee28da1---43856799972.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/525c383578a169b6037f9b757efa3d05/wutaz.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/88094575562.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd42b706c55---semovafetukegasoruvibuzid.pdfIn PDF document text
    • https://somogyplusz.hu/files/80616991462.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/u1lcn7gksmnq5399a9k9tgb4s6/66353473834.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743c2bc7270---60427566447.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/41349245001.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/lagelfvepb51uimi66pbs08sb0/84754211532.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF22 5704 bytes
SHA-256: b08eb07844954130e0a9668e9606c19118c26cc87704440622e935efc889dc13
font_01_sfnt_off0000f27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27F 9296 bytes
SHA-256: a2cf6ad1ba7fa01537b7bebc881ef12c70c2d663e4bc67c2fad27aa6b472375d
font_02_sfnt_off00010bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD5 10880 bytes
SHA-256: b10ab11fabc401fb53a4221286a1b6fd64cdddd977171bc3a190145c512208e0