Malicious PDF — malware analysis report

Static analysis result for SHA-256 e860e644abd22646…

MALICIOUS

PDF

980.5 KB Created: 2021-07-25 23:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4527857482a88eef9b01a52396b8a700 SHA-1: 426a9370a0a8e4d39165a040a737a1fe123bddc0 SHA-256: e860e644abd2264678efc0b165d2478341893efb6d6bcfd6b6cb28511699bb0b
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing multiple links, with a critical heuristic indicating it points to a compromised CMS upload storage. The presence of urgency language in the document body further supports a phishing or malware lure. Although no scripts were explicitly extracted, the PDF structure and link farm suggest it is designed to redirect users to malicious sites, likely for phishing or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.2100

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 http://wadsoda.com/UserFiles/File/66942275492.pdf In PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6cdda01f39---70118837273.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/zadojif.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774d3169ec7---16268652451.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a004d8e4760---62498086610.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c21eeb98792---motiwugejamubamafos.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/6h0a0acspdpotqqks646p4ppf1/vizadarekusozozexox.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/d4pcasfvikvi1pt55dpjbsdnai/96894995336.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/32151750341.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160860601c117f---6879748336.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/jetifix.pdfIn PDF document text
    • https://sce.tw/uploads/files/60d3e68aa9af5.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/d0a6d0079374cb1da11c8c0aa55127a4/65584786280.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b10165152de---pudegudopefirenotiwi.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/tgj5vp5rcsjrok3qi0gem26sh5/lexezijesetinus.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16096942f202aa---kebosixe.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/99172278394.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/diguzoxi.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b618beb4c---kenugubutosopamapep.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608480074fb52---26363226171.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160d1f5b7457cc---xivaboxajatabufidiviraxo.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/30ff55b1cae2ddf0c0818c66c9da3b8b/72255442433.pdfIn PDF document text
    • http://zuche0551.com/upload/file/71639103079.pdfIn PDF document text
    • https://samudra99.com/contents//files/96387369740.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=respuestas+de+ibec+learning+games+for+toddlersPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b5e47fb25---8894274271.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000cb939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB939 11248 bytes
SHA-256: 729ef8b9f0ea29208badbeef89534be77aa1931492e81643405cdfce09c704d1
font_01_sfnt_off000cd337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD337 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000ceb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB55 36664 bytes
SHA-256: 234a2efdf6ee6bdcd9fbe14b91da69a1089289e9a137adabfcdf03f1d64b5ef6
font_03_sfnt_off000d3eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EB3 16152 bytes
SHA-256: 00640ce5be49cad925ed4ab5dcb5a488f790fd3bdec622e249af59aa014a6f1c
font_04_sfnt_off000d543b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD543B 197120 bytes
SHA-256: 11744af54c88286adbc91d64eaf30249ead45b4fa98b8bde61a1ab227903ed53

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