Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f8454c6f603d546…

MALICIOUS

PDF

106.0 KB Created: 2021-06-21 07:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: f2d2b33bd25b720ec05eab571fc93964 SHA-1: 52720b3dfb9b2275841ff917baa9275e071e20f1 SHA-256: 1f8454c6f603d54634faae3ec7562f7c3c1d9cdf1940f1ccd5b7b5d7fd66e0d0
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the presence of many external links indicates the primary attack vector is likely directing users to malicious external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://catamma.ru/uplcv?utm_term=swan+lake+classical+music PDF link annotation
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/c3a4f7268bcd128884988c95bc82170d/34271763834.pdfIn PDF document text
    • http://ahreco.com/uploads/news_file/22485564488.pdfIn PDF document text
    • http://jarosi.hu/files/file/wexewoponoxozarikazoziwez.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/b738af3933391d99f301c4a6fbd355bc/ladewopowabakap.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/vdrmh3aofeimc27kheb8dj3sli/gumuledesazix.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160761b1bb4b67---19119264853.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3cc85d1c8---82912161702.pdfIn PDF document text
    • http://treeoflifetolfu.com/clients/0/07/07f122ebb3396bb3f917f2e62af81596/File/37228408885.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/fapixiruji.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/99719836154.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/lutakezufi.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/9fb699273cfe6d8d8f0e8573b944d1f1/rugifuziduluwem.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5d4398dbf---12870120440.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f544371ff---11137729191.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095390934d16---gesovotaz.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58f7bc7bff---88336324076.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c0d63c268---mawifepixi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000149e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149E8 4740 bytes
SHA-256: 14b633de3594e807f7dedc1ae3e68fc4b44b8a9326833ea4465842c54a158801
font_01_sfnt_off00015aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AAC 5108 bytes
SHA-256: f6007d7e72e6ab8bcb82382c87a55def0d310b36f7ffb64187dea7a428db3b7e
font_02_sfnt_off00016c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C0E 14936 bytes
SHA-256: 1e730edbec569e1165167887e5e6134e1ab16b1d556093fd504ef0e1a5598f98

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