Malicious PDF — malware analysis report

Static analysis result for SHA-256 1437888352568d6a…

MALICIOUS

PDF

87.8 KB Created: 2021-07-04 03:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 8e8304cebd4f7a4d55c378f64d71094a SHA-1: 8a0f27926b93c35fca2ea0997dd53134aab3e17f SHA-256: 1437888352568d6a38310da24dfca50b9d705bb0f85e0e57768de34aa78fb673
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The embedded URLs are designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://drafthe.ru/uplcv?utm_term=sami+old+age+home PDF link annotation
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16091b5fb80b69---87006328416.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6d40bb8590---27010210354.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/7ab9de7b153b82a254eccf8927eb64a3/42675293735.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/57600c6a4054c3adb9b212ae4d7e25fe/vibol.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160708c3097093---58630118000.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/e3cd90d6845fbfd1863dfe118a24b3d5/12321166116.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/24138542b8f2aa3aef80795ec1d16600/warifus.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a685a036e6a---zakifu.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/e1dc9cc0064ace64dc4962186bccd036/89987980513.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/31479443265.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dd9f6d397---jidixubi.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/d87ae5335cf35be710aa711b5e928311/zogebimivisi.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7fd07f4da---kawexeruvavegof.pdfPDF link annotation
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/d8cd1fe747096fdc4740a933b6e34a48/nilebelodenov.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/lanupiviwanujedinuziba.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160dac474d40d3---85880458706.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/sikazexokelex.pdfIn PDF document text
    • http://boxethai38.comupload/file/bagusosimanemugo.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e0fd42806f0---44094177988.pdfIn PDF document text
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/vokitewi.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/hoh25gjbp73h6bmslcb3eh1bif/23551899467.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/4b346e30b7080a5f7b0acb5b759ce6ce/68249773391.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d57f6657d---99471957389.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/36fd070d1f3affee3b1da68e879788ef/97087299560.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7e8ec24fa---fibinebinojiwobaxa.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/sejumovorutusuzupo.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_off0000f554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF554 17908 bytes
SHA-256: 9f5a9566dca8e417e78a4abfcb148bf0da0261136890fe95c3eb3b58ec65d469
font_01_sfnt_off00012315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12315 10300 bytes
SHA-256: 842d4df1f3f309ab8109d07ecb5d8f039aaff4345b0181d39b1f6346431c85e3
font_02_sfnt_off000139fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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