Malicious PDF — malware analysis report

Static analysis result for SHA-256 0471ac8fb64d3e94…

MALICIOUS

PDF

154.6 KB Created: 2021-08-02 07:34:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 4411084d60bfa73d6d541fd1e6174e52 SHA-1: 33d078e11750619a4e74e04c7136ecf6b42c63a9 SHA-256: 0471ac8fb64d3e94c18f3af367765ca4298f5344d65691494e281138093cd94c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9516

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://pixomot.ru/uplcv?utm_term=10.s%C4%B1n%C4%B1f+co%C4%9Frafya+1.%C3%BCnite+ders+notlar%C4%B1+2020+pdf PDF link annotation
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/mugojaliloko.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/fabetovefug.pdfIn PDF document text
    • http://dashoernerboot.de/userfiles/39287679854.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a263ca5729f---kufosibomadev.pdfIn PDF document text
    • https://netpage.info/userfiles/file/25833491886.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/56635890226.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/58431635290.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9ef30083f---kimunupotipuremaxi.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/bekikifew.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/ferinevugor.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/8635c0dd6ea9bfceda08f5a3a402998d/50553132095.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/1e1amjd31d9fj73u931h6ffpql/78138417441.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607f078d58bcb---lisipivekefasewudawa.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/gexusetovupuvebi.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/5232a3c43251e53945fcfb895ab1808c/faponuwes.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/vexujokeworisuvetoramut.pdfIn PDF document text
    • https://edgecs.com/documents/73858219752.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8efef888d9---wajeruzevokafapem.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b6870546e2e---15577273879.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/bivefuwevesarewux.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3be5f354cf---wizukedimovobinisegow.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/86811404513.pdfIn PDF document text
    • http://arkystudio.eu/userfiles/files/22695186482.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_off0001f757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F757 18808 bytes
SHA-256: afd7d424124d845284d33d6036e487b06a70c68ba18696c09fc89c7588ed9108
font_01_sfnt_off00022527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22527 11460 bytes
SHA-256: 41762c7ba2ff359e135c9c90f18c3f69dbdf514d87cbd619fedc4ef33f820946
font_02_sfnt_off0002401a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2401A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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