Malicious PDF — malware analysis report

Static analysis result for SHA-256 294cb2dc9c3c29ce…

MALICIOUS

PDF

83.4 KB Created: 2021-08-17 06:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: a83166c96d66f377e03bdcc9b292648f SHA-1: c9159213eebc98f0044b3b31da12b1ca5b981c11 SHA-256: 294cb2dc9c3c29cee6a18d9ffd1a8a44e1c907e9660d3988a6e353202588a098
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest it is designed to lead users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160cd3258db81a---72530252406.pdf In PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/e770d751a8b02dbdd48cd8126ec51c1c/tulagipofipesepewuriputiv.pdfIn PDF document text
    • http://rayocazar.com/images/elfinder-1.1/files/file/logugomugivovelejopakax.pdfIn PDF document text
    • http://rzn-house.ru/upload/file/71734564425.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/9676111713.pdfIn PDF document text
    • http://innobiztour.com/FileData/ckfinder/files/20210625_C0309FE34EB0BAED.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/48605674396.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/fawoxukesatufez.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/sazojiwenag.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/p1hd9psnh19bthndghbo3gfnbe/82996380746.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/a9d6588ef18f2a1d94e19207ab382482/70110254589.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/53336892863.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/d5c6da60e56564bf88f834d1899b48d6/gujodaliz.pdfIn PDF document text
    • https://yar-net.ru/userfiles/file/1636309244.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/83128228946.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/pepuxixozabofemare.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce6c8b7062---25526261630.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8a5a768b7f1d788938bca991301dbc8c/45271345690.pdfIn PDF document text
    • http://namthangbasaltstone.com/uploads/image/files/44291021980.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/9279b1de6ec76310ade6c57a087851de/radinetamupul.pdfIn PDF document text
    • http://archgeo-leszno.pl/uploads/userfiles/files/gibifazizelamabix.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/15969525713.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/zotemuzebuzibo.pdfIn PDF document text
    • http://interno-kazan.ru/upload/files/sijutaxuzimurajawe.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/eb9bb1739dbeae050740947e58114e82/18264579128.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+make+wireless+charger+work+betterPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EB 16700 bytes
SHA-256: ca30b399f6b8999cfeef4452bbf7b0f97ed34193e232d5828410819cad78fbd5
font_01_sfnt_off00010e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E41 10884 bytes
SHA-256: 9e70fabadc95e8cc58129b1ad885495df39884bb154d25e190cf193bf1250fa0
font_02_sfnt_off00012775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12775 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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