Malicious PDF — malware analysis report

Static analysis result for SHA-256 d40f65937fac3a06…

MALICIOUS

PDF

86.4 KB Created: 2021-08-09 00:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 04f33398f3d9d51625a30c417acbcd95 SHA-1: ec17ff06f198cf632a25f84d3a6162c01e88ee12 SHA-256: d40f65937fac3a06b77be623e06b659b9ae892ae955afab98227a6a366e0d4aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, hosting numerous URLs on compromised WordPress sites, likely to distribute malicious content or phish users. While no scripts were directly extracted, the PDF structure and link farm behavior suggest an attempt to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f0ce444ad---raporakuf.pdf In PDF document text
    • https://communeouchamps.fr/userfiles/file/98559044695.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/70060801501.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/nisinotaratowagidefutipa.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45d9448235---40831313136.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/zumawif.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/29379758968.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/zuzepisureleserepu.pdfIn PDF document text
    • https://flomogroup.com/upload/files/xeludowokawanogu.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1eb14e472---73860423107.pdfIn PDF document text
    • http://deasreunion.com/clients/860224/File/mapagekikexa.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/genuretagad.pdfIn PDF document text
    • http://malifer.hu/upload/file/22878953008.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/c1de4109bb8e00c398ae2d22825897e6/38882108184.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/903d5694f7c90defdd989c9afe3e4080/forofimonezapad.pdfIn PDF document text
    • https://blokhol.com/upload/files/nonulos.pdfIn PDF document text
    • http://hopkinshigh1988.com/clients/75739/File/88033132304.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b15b03133e---95507860471.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/igijo1tccv25sh5h0507cfednq/moropufevowupof.pdfIn PDF document text
    • http://kenshopvn.com/uploads/files/31282838158.pdfIn PDF document text
    • http://piau-po21inn.com/CKEdit/upload/files/kusajekonozafodukekijamov.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/pisorepafumo.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/leribelodoxadobaxonoviwat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=el+arracadas+vicente+fernandez+pelicula+completa+en+espa%C3%B1olPDF 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_off0000e9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BA 11196 bytes
SHA-256: df1a4fb8ea9deb57f7a019b75bae82f2f00a4bcaeb4ec674654e1769d59b3106
font_02_sfnt_off00011baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAF 17488 bytes
SHA-256: c6316062994121af99677e5ccac1ba7d90fd3bac04155674cc89459db84f7f1d

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