Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd3e06b2ab9faad1…

MALICIOUS

PDF

106.3 KB Created: 2021-06-28 09:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 95f7493792e0971eabfc49aca2be41ec SHA-1: 18dbfca0673695a94a27c706d66791106ac3e043 SHA-256: fd3e06b2ab9faad18aa833212678c2ac2a2b7906ea2f50cd04b6445ea61cbd7f
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains a link farm pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The 'Payment redirection lure' heuristic further supports a phishing or business email compromise attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://drafthe.ru/uplcv?utm_term=the+julian+chapter PDF link annotation
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/b0316f977b884d3306c45e973bf66154/ruvasifa.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/ccktdol5velnk5knfdb2mltld0/26716250316.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/tirugifenaboxul.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/4913849.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/84be89ec7bd812f0ea6dcd9b7b35a348/29605981152.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/mamaje.pdfIn PDF document text
    • http://michianaorchidsociety.org/clients/2/28/2832e32407c795c8d28ffe68102aa18e/File/rixapoj.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/58070374798.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a253eebd62d---91825303065.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/2fadaddec4c441d7b62cbaf3b6a4d0be/3088088400.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/974120cd849b1695d457e19c3f3056a2/16657457452.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b38701e20---40374109500.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/82975003126.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b3e4db8bb---42224892324.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/danoxono.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/10148900089.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/d088174b2a71167727322a71bf3914c1/vuwuxunukitusirarefi.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/lepimabezopoxiwatoxer.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608684e8ec474---gobudaviriraniv.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/n70in8pk92qctjjl6ulhtovfcs/mijeverogiranoletekotom.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad6a8423adf---92978919532.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/20856717808.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cbd2b5704---jopetevufak.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_off00013e62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E62 17096 bytes
SHA-256: ed4443cae651858a34d101509c6a4faf9c07ba26cd3a9352ca71db31338b141d
font_01_sfnt_off00016b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001834c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1834C 10376 bytes
SHA-256: abb097a1c545ed9805b877c6bdc59077a746bb3d0651202943e3f25eb6713db3