Malicious PDF — malware analysis report

Static analysis result for SHA-256 70fab61aef7a9549…

MALICIOUS

PDF

86.3 KB Created: 2021-06-26 11:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 9c5d9e77d59cab8d09bf36a700135813 SHA-1: c9100e8a950534615318c97cc15c84eb6f1eeb5a SHA-256: 70fab61aef7a95494a913921b451bb9d6e1c2e6fc8b372a7d1a2e36b6bf929d1
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised WordPress sites hosting other PDF files. These linked PDFs are likely designed to phish for credentials or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2d75b734a---sesatafogak.pdf In PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/296a5586958f25c00be0e14cfbc9eb5c/xewororuxaz.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16083a7e89f880---12599625165.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7166ec384---puniwoturumobifezegigever.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082e22a4a40b---xawudogaxuv.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/31229614390.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/1dbf89f73678d418bb8b70472188a5d2/69868107851.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/040a80accc533235f2ab890482080ad6/87741288205.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/quu4c1th7flt19c42ng599nj4g/50091580035.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8d8be227e---wezokavizubewizojetifeg.pdfIn PDF document text
    • https://micro-churches.net/uploads/file/nojezatizokowesiriviwitaj.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/290bf9531079d0da16682494da7001ea/kutiwopajixi.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/20311878341.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf245272f5b---dibuvamoxadude.pdfIn PDF document text
    • http://policylic.com/uploads/files/23787201035.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/9584915946.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a439df0d2ab---62462778847.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bf41c8a306a---45524826799.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/wafopovunewob.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/kudugosanom.pdfIn PDF document text
    • http://tochalco.com/uploads/files/bovaja.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/59830673152.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/44513999476.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/4g9e8vjj4r7cjqq9auiei8v2l6/70025686413.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=ox+cheek+cooking+timePDF 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_off0000ecce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCE 17724 bytes
SHA-256: 42484f610f81ab2a364c568aeecf69d8337197ffb9fb76fa8d41d3a00f697900
font_01_sfnt_off00011ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE8 10420 bytes
SHA-256: 4477b133a6966764ba175c91300a98d780c3e3c8532f9b371a5b7a63fcd62d97
font_02_sfnt_off00013262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13262 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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