Malicious PDF — malware analysis report

Static analysis result for SHA-256 a01fb99aa5490531…

MALICIOUS

PDF

90.5 KB Created: 2021-07-30 01:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3525bf4c08437de50dc955f3893cbc8f SHA-1: d280f1b01143ca49d6965769df49f7a83a08ff0e SHA-256: a01fb99aa5490531bfa2cd6396c5dbcde028225d4a86369a41b0fbd774ec6dbb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a phishing lure, employing a link farm hosted on disposable domains to direct users to potentially malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may instruct users to open a password-protected archive, a common tactic to bypass gateway security. While no scripts were directly extracted, the presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://chcial.ru/uplcv?utm_term=how+to+download+wwe+2k20+apk PDF link annotation
    • http://thedreaminitiative.org/Content/Admin/uploads/files/42472288627.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/tusureregidofidur.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160aa35f07b085---53443866320.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a9f25df76---zigonusop.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/nenuridekorevita.pdfIn PDF document text
    • http://demkapi.com/resimler/files/pejam.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/govimatusezaxoxixuxojom.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/webunalirex.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/wolomekofarosa.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160867c001729f---11940009888.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/b09f11622fa28965d0082766d29516ea/nudajemavakunulitijemez.pdfIn PDF document text
    • http://exima.kr/userData/board/file/12185758526.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/7f60a7f9722baec3ba834c16af6d4f3b/xivobaziwavozojud.pdfIn PDF document text
    • http://zaiger.ru/img/file/vepano.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/29860518047.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/efe5b39c1b574c84459d3398c9be795a/wuvenojetalopin.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c41c90e9e67---zijewizupegetuzode.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/fb9975869c3bb93719ae12e58b971eea/79312151156.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/bebaderedixafinapemuj.pdfIn PDF document text
    • http://jordanfamilyreunions.com/clients/5/51/51534e3e38036466a76ca8a024fd4923/File/juvidijora.pdfIn PDF document text
    • https://seeyounow.net/userfiles/file/feginezurubujipusepika.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160a429b3d4d9c---beruwi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA0 18076 bytes
SHA-256: 4b963d91693424fd4de17d030fddb4d0776c0e9c18b82171d9225f74cf6a3c62
font_01_sfnt_off00012c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C02 10436 bytes
SHA-256: 66faf6b9f6b82b5ed0da54d41e81e848bf5aed61949c0a553e4384399e16abad
font_02_sfnt_off000143d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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