Malicious PDF — malware analysis report

Static analysis result for SHA-256 117b4e18d0212422…

MALICIOUS

PDF

71.7 KB Created: 2021-09-04 05:34:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3f10a808cb40f5c40f7d4a0d1da6f273 SHA-1: 6a43f396d796f65138b82443b79e3cb2814c4aa3 SHA-256: 117b4e18d0212422a5fa47accfc0e239a8513f6da5eb64040aee1dc9e38b296a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other potentially malicious content. The primary purpose appears to be directing users to external sites, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/6f4c710272b35131d43739a63a9b4b93/kowadovobalupigazater.pdf In PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d868654ce43---rulajafozotowegopitotedor.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/387599424529dbeb40b7e4cbf92d4b8d/98691735225.pdfIn PDF document text
    • http://www.ntweac.edu.hk/admin/ckfinder/userfiles/files/xinozovapanuwamewojaxi.pdfIn PDF document text
    • https://abrasco.org.br/ckfinder/userfiles/files/fadotiwilolure.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/musukulezuludixat.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/572925100797aebd4792286d1ef86135/50907256296.pdfIn PDF document text
    • https://webrobogo.hu/kepek/xuzopineze.pdfIn PDF document text
    • http://emiem.pl/public/upload/ckfinder/userfiles/files/podifamuxuduzol.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab33a6268d3---wewijumowusajisaxap.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/14459448282.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/603f63fb2f0d09c8989198f53b96d58e/83759682780.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/86662739087.pdfIn PDF document text
    • http://greenbiotech.vn/uploads/userfiles/file/fotuk.pdfIn PDF document text
    • http://moscowprice.com/content/xuploadimages/file/6065024790.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b284f37cd58---24292365294.pdfIn PDF document text
    • https://indianpowerliftingfederation.com/userfiles/file/66492862900.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/89967705966.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/sasedadupebaf.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/56822994301.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085b048ea08b---96443331774.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9823e04be---74898395517.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=boekels+discovery+metal+detector+manualPDF 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_off0000b70d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB70D 10956 bytes
SHA-256: 4abad2de3afd267567a7f5bfa30a0ec9c0f309e574f9680385d3f865f2bd634c
font_01_sfnt_off0000d087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD087 15696 bytes
SHA-256: a99449fa0ce3c24193ae998851a824be76063c56b63a6366b422d8f38504b3b8
font_02_sfnt_off0000f8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.