Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e914360b6cd88e…

MALICIOUS

PDF

68.6 KB Created: 2021-09-10 13:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 046699e46d24a78d681c59da0f4aadeb SHA-1: 39bedb2c3418725ffe5ee7bfd3450a83c6685d97 SHA-256: 98e914360b6cd88e10cf84c098894d12750a57ea76bc2096f1e2f09908f1e336
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and multiple external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a pattern of using such sites to host or link to malicious content. The embedded JavaScript likely facilitates the redirection or execution of further malicious actions, contributing to a phishing or malware distribution attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://glamour-nsk.ru/ckfinder/userfiles/files/sonobapefopo.pdf In PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1613468e767af6---57477887823.pdfIn PDF document text
    • https://rent-1.es/ckfinder/userfiles/files/63657338660.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/xibikumexenobinowekuze.pdfIn PDF document text
    • https://jphotographyllc.com/userfiles/file/logazuxupabive.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/jolirilekawo.pdfIn PDF document text
    • http://laconchigliacasevacanze.it/userfiles/files/xivumewut.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/nawurabogapozeguze.pdfIn PDF document text
    • http://jinyudachem.com/upload/files/jiruxi.pdfIn PDF document text
    • http://ateliergermain.org/sites/default/files/file/wotebobidekuraw.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/60563601248.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/vinuzedivexorutirese.pdfIn PDF document text
    • http://kastely-vacduka.hu/fileok/file/47620248762.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161365ffab1f89---selubiwutugexe.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/30607368776.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/c802cd76fa771e6eae11970db3bd8c62/fexubexuweti.pdfIn PDF document text
    • https://www.algeos.com/js/ckfinder/userfiles/files/65609230176.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/rodeworevofetafidete.pdfIn PDF document text
    • http://colokit.thienlonggroup.com/Images_upload/files/beziruwifowes.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130abc45e5f8---xanijideneju.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/f67dhmnph049or0fvgfvq65o7j/rilamozin.pdfIn PDF document text
    • http://maturitni-ples.eu/UserFiles/File/losiranimamub.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/ketoxurudep.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/lenidifowedalebozuxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=context+menu+android+studioPDF 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_off0000b0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC903 10596 bytes
SHA-256: 1f4a0a917e3bc5db79086185eb8f7192e1c85f8be1bd92c79b1dcf5f053edcd0
font_02_sfnt_off0000e13a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13A 14500 bytes
SHA-256: 74df335c4290af8212afa6d0730a0a430303ef0de467c7a5a7173a253db8d38f