Malicious PDF — malware analysis report

Static analysis result for SHA-256 64009760dd87d57c…

MALICIOUS

PDF

75.7 KB Created: 2021-09-06 07:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0eb40ced81570e351b563ac643c4fce7 SHA-1: 7a19aa8f0b66684b0be8f23a77955b06475e983f SHA-256: 64009760dd87d57c1a43b9ea7a529a61fff2b872aa41e968d231574968add347
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The primary purpose seems to be directing users to external resources, likely for phishing or malware distribution, rather than delivering content directly within the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://crysiq.ru/uplcv?utm_term=everyone%27s+guide+to+the+south+african+economy+pdf PDF link annotation
    • https://almoheetmanpower.com/public_html/userfiles/file/45520600655.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/zibovonukotupada.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/7ed528115aebdda8fa38220f79322d99/kujuxe.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984b853de64---tawobopanoza.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/a9239ea966db4b90a7b1f218daed0e73/ziruzurufemapiputokav.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/6f6a15d60e436fa96b0d794de13677a3/68822520290.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/3430625124.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/14007986228.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/17285b71824b2ac5f729121acc399c87/68519920105.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/74e5778e47644b633b09deeb21266b1b/sobanam.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/ff6fad0544fefc96469af917f2a9669a/76449354724.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16077eb7c290c9---24515667757.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/34041577603.pdfIn PDF document text
    • https://migger.dk/userimages/file/31027218828.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/7c754253016081ccfc31f9b71092b5ed/3431888922.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/m3ed8n2ig440j7qnvoj30n68ro/88693319546.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16072e467796b2---87606312266.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/tajovapukuranovawi.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/3962898c13478bbc996e69615fa1dfb8/mabidek.pdfIn PDF document text
    • http://newbusan.net/FileData/ckfinder/files/20210706_A9B86D40A97D88DD.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160fd48329aa11---wonogurazugajekezarika.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/kepojakatamebirinokixopoz.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_off0000c222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC222 11320 bytes
SHA-256: 205ef9f2180d60af3a000b435a5a3b7d31dda2ee18ce9bd97432c1c65222e9e9
font_01_sfnt_off0000dc79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f48b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48B 17288 bytes
SHA-256: 6f94d24bba6b85cc299f25fab61625cfeb2d515d3971ef79c4d6fdb0cfcf1fa9

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