Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f6940ce439acd8…

MALICIOUS

PDF

90.0 KB Created: 2021-09-03 13:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bff18cbb700fde5a9d7a8d69fb493b74 SHA-1: 72a62448109bcce9de891e4778dec63fa8f2a95b SHA-256: 47f6940ce439acd8ee1942eef9f77bd4c73f66e962d3de12ed69524242c83006
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many hosted on compromised CMS upload storage or disposable domains, suggesting a link farm designed to redirect users. The presence of a 'convert PDF to Word' lure implies a social engineering tactic to trick users into clicking these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://healthmatters.me/userfiles/file/gilesebokedosufa.pdf In PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/3pteq6rqrolbrlib6prms55c73/lijivozibexu.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/62553802789.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c23556d5b---fopawapalimujeleputopuxas.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/17358773298.pdfIn PDF document text
    • http://soojuspilt.ee/files/file/bomevuvosazeranumonel.pdfIn PDF document text
    • https://matfreklam.com/calisma2/files/uploads/6685087112.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/aqp8i43aegcmg6vhu014lh33v0/4917422054.pdfIn PDF document text
    • http://lhs75aa.org/clients/0/08/08eb77d093c5251d787cf05842b4a73c/File/22120920673.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/54893436406.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/54e954b2d4a11e70e6d844a158074c4e/53884406875.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021052718380231.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/d001bceaf589c97e308e7b107cebb644/46246031062.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/7ec62eca6c1646844e951bbb6cce7cb5/gubefetazipowimi.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/kubitaf.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/sazibor.pdfIn PDF document text
    • http://jump360.co/upload/files/20210814134516.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/23151143546.pdfIn PDF document text
    • http://yalciniskele.com/imgup/file/94573610119.pdfIn PDF document text
    • https://electroagro.es/pub/files/nikimumeb.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/2213659258.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609041c061692---xosebilozu.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ee6b79075---30998128546.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=convert+pdf+to+word+ios+appPDF 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_off0000fb24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB24 17768 bytes
SHA-256: 62ac39581b185461ac2729b51e3a9b7a6defc157ba40130993e5102e80237045
font_01_sfnt_off00012995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12995 10628 bytes
SHA-256: f0c1ef18182da4dec9611ae56c3f9d908a9481efe50ac25fbefeaf0868721a33
font_02_sfnt_off00014225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14225 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1