Malicious PDF — malware analysis report

Static analysis result for SHA-256 6965a27bae6ec8e3…

MALICIOUS

PDF

89.1 KB Created: 2021-06-29 13:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f2fd9a668f655850457180f0868040af SHA-1: 0346b2dfdabad6f7c0ff251aa66eba36306eca9a SHA-256: 6965a27bae6ec8e3f9799fcc845446882833bab5e7cb3b8421967e1f04bf197f
156 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 a link farm, with many URLs pointing to compromised WordPress sites. The ML classifier and ClamAV also identified it as malicious, likely a phishing or malware distribution lure. The embedded URLs suggest an attempt to redirect users to malicious content, potentially exploiting vulnerabilities in their browsers or tricking them into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://crewmak.ru/uplcv?utm_term=petitions+whitehouse+gov PDF link annotation
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/15b2b1b9dfd56e1c065765346e537d11/salekumufe.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/fibuluketotak.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/36960568241.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/41536548748.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/3d764f01b5f6963bc5cf7f9c46f86074/gakikareluvonojiponujofel.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b141ab7f4---17722208574.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bfadc145202---79611066422.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/8c8e7bb3b0e46d47e46d7ad45b249fb9/63588903517.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/252c6b04315d5f4c999443a269c30acc/32589990255.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adbf140284d---punegub.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/f519a4e47727723d5145d31fdff67950/limepupewifigegoxod.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4ea7bda5fe28d1fcd0689ff19db86f47/94938955787.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/nafosakazifipuselawotev.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cda8c4660f5---23469293413.pdfIn PDF document text
    • https://penal-garazh.ru/files/mugojuxavox.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/a26a4b35226fad50e1487674011d2f5b/lokemejidokuzu.pdfIn PDF document text
    • http://alkanboya.com/files/file///87256528451.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e9d152d30---36899424984.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607e36d754b73---disaxoponigosofabivujo.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1609c22c66add6---dokejeraz.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ca4e5905394---29653952658.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/3788b8541a90de8fc8b595b0c98ba235/funasuditi.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/oo9silckg0e4nvi9qdcovg28j6/1309415987.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1607eabbe34de8---xabeniwarawivij.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10273 10332 bytes
SHA-256: ac452363acfe38fec29cd83b8b0ce39adc601a149b1e1bb9fe1cb886521a6049
font_02_sfnt_off000119cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CC 19472 bytes
SHA-256: 7f72939ade726a8e7180c04f808b34dea8b9f7fbaa01d77b398683309c1c1d03
font_03_sfnt_off00014beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BEB 2064 bytes
SHA-256: 5221cc56e96b657ff7c15f49bf1fbf1b5222e15cd7ffd769ce953162a3e53832

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