Malicious PDF — malware analysis report

Static analysis result for SHA-256 beaae151d16731ef…

MALICIOUS

PDF

88.8 KB Created: 2021-09-05 08:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d576ea18a6162c2e80dc83ff7449dc1e SHA-1: 26973a393591f9c555148f59145d0aaaa17a8aa3 SHA-256: beaae151d16731ef73e95e361ee103d1c8d47d42938c96e040a5a2e727799791
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and other potentially malicious domains. The embedded URLs suggest an attempt to distribute further malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/f174bcc2de7bcb9a6015a66bb35d476a/jeratozifejazine.pdf In PDF document text
    • http://pnmanagementsolutions.in/uploads/31511552343.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128b5fc70816---36630050732.pdfIn PDF document text
    • http://glcore.net/ckfinder/userfiles/files/5586459299.pdfIn PDF document text
    • http://klusjesindex.nl/images/uploads/81687606238.pdfIn PDF document text
    • http://talleresjpg.es/img/file/43030166487.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/ac764f1036bb1b05ff8498e7fe4d77bd/doxekaporajeguguwenixufi.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/nukezanidavaxeka.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/88659378840.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b14aeac57b---41262236311.pdfIn PDF document text
    • http://samtekelektrik.com/files/xuxadifenorotito.pdfIn PDF document text
    • https://susta.vn/userfiles/file/91319333448.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077212032467---vetapejijutif.pdfIn PDF document text
    • https://relaxbotanika.cz/ckfinder/userfiles/files/dovusuvukofawotupiledagi.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/b2bef2a7254e4344afedf5bc0e8c8919/37060546975.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/kepoguravesatinalixodid.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b8fb5b766d1---rafuwibajori.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-8-6/20210806183549768364.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/mejav.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/apt9qn1e8v3ck8dvubqedv4an6/39936057356.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/letizewowasupuvolo.pdfIn PDF document text
    • http://villa-margherita.biz/userfiles/files/muzagasot.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/c68bb2a13fda5dc5ff8e49785a9fc551/64627665027.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/56631243937.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=light+and+shadow+worksheets+for+first+gradePDF 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_off0000f864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF864 10720 bytes
SHA-256: 0e867adb64970e4e3ec077cee498dd06573cfe1331da1b2c487853cecd2e6710
font_01_sfnt_off000110d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E9 17184 bytes
SHA-256: 4d35672b8b2e2435b99fff6d563e92fd30f5d779c7d3a21f283640d6b60a0072

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