Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba54ea8056e29da…

MALICIOUS

PDF

93.6 KB Created: 2021-09-15 19:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ce7041b850b07168838f17841e3a2576 SHA-1: 97157c273c427af9a25513c5ced6f730d5be313e SHA-256: 8ba54ea8056e29dafc98ba3ff2ac8ee48e7273140069a5dbfb216fe191ce1175
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The 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, directing users to multiple websites, some hosted on compromised CMS platforms. The presence of numerous URLs, many pointing to disposable hosting or potentially compromised sites, strongly suggests an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/9fbb70091419444e1e956eea1c47e2da/povasu.pdf In PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/96554631425.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/37696912963.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/35114775181.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e69fc7e61---94824799731.pdfIn PDF document text
    • http://www.pratikchoudhury.com/fckimages/file/63936879532.pdfIn PDF document text
    • https://mmszke.hu/files/file/podewefibi.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16130be3e37b59---76954660356.pdfIn PDF document text
    • http://sanfrancescovet.com/userfiles/files/faduzuxomurimavowunul.pdfIn PDF document text
    • https://ruedi-leuthold.com/userfiles/files/norijumemebefixavekuk.pdfIn PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/75427905390.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/vopugowogegepagubas.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/ucdsn3kb80j7lrs5jfk282uj66/57410156034.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/161405ba762d64---petukoxewenodigeku.pdfIn PDF document text
    • https://netcsemege.hu/ckfinder/userfiles/files/xifasivid.pdfIn PDF document text
    • https://madeinstlucia.com/userfiles/files/49370912832.pdfIn PDF document text
    • http://araulmor.tel-cor.com/images/library/file/gobovi.pdfIn PDF document text
    • http://paraleumarian.ro/app/webroot/files/userfiles/files/95277139805.pdfIn PDF document text
    • http://srilakshmienterprises.net/uploads/20857399083.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/fokipujuxakamob.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/fuletubele.pdfIn PDF document text
    • https://ecoquimica.cl/dinamicos/uploads/file/10916597799.pdfIn PDF document text
    • https://safetypadlocks.eu/eurostyl/photos/file/tomoxuluratinebemukejow.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/66575708417.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=mega+man+9+download+androidPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138bca47a100---52165109269.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_off0000fd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 10572 bytes
SHA-256: 1f1552d9b035a2ce0f2535353752c878685e46c1267905851d3b2de35ebadfe2
font_01_sfnt_off00011506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11506 22816 bytes
SHA-256: 692fdfdf0f5b0db94ad7b58e0b32efb2808dc224d5508018554973f3ac3a4ac4
font_02_sfnt_off0001508d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1508D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1