Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ff201fa37cdd53…

MALICIOUS

PDF

74.6 KB Created: 2021-09-05 02:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 55a8ada178b75a57cc39e53c8658668a SHA-1: 09ced9bc4abd7741faf26a012b79d59594c630fb SHA-256: e4ff201fa37cdd5331eb84ceff052ecbb0ef078af0398c3c059b844954e9001f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were directly extracted, the PDF structure and heuristic firings indicate it's designed to exploit user interaction with embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://dianthusindustrial.com/resimler/files/wopadi.pdf In PDF document text
    • http://gadkowski.pl/repository/filemanager/file/87077952501.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072a9a58ed95---99143107671.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/wojimubujapekibewejixomu.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080a453e6217---26958148207.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/i85erm8paiaqhtbhp4957ts1s3/94431711300.pdfIn PDF document text
    • http://mesahighclassof63.com/clients/79820/File/72978931158.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/kofoguxosexiguk.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/48289376810.pdfIn PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/menosefemetojununese.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16092416f12026---48797880775.pdfIn PDF document text
    • http://baominhlabors.com/upload/files/vowedifotizozufif.pdfIn PDF document text
    • https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/betubokifon.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/venimipugojuzusow.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/70648215708.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/81804131272.pdfIn PDF document text
    • http://jungam21.com/upfiles/file/1629392608.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c7f9492d9ef71f88a4e426574c9f553a/40740583882.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/83057286181.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/6630754305.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/9d476b2ace65bc9c7871f8ee65ab42e0/98362843599.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803b1624126---jifulowisufixewowupok.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/sonetudevinabugipajelufus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=clasificacion+borman+cancer+gastrico+pdfPDF 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_off0000bdae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDAE 11132 bytes
SHA-256: 3d1a42b5899b40bbf54b61c882c2a210dea871a3624c682b5b85233dad65f280
font_01_sfnt_off0000d73d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73D 17344 bytes
SHA-256: 67611cd4a4bc9866a6774906781707df423923929625ef310cc3bde4ea08fc3f
font_02_sfnt_off0001048f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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