Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98c886926e2eac1…

MALICIOUS

PDF

92.3 KB Created: 2021-09-13 22:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 49b9ddb8d5cf87a7ec5961c149c77674 SHA-1: ab28aa5f1ab505eea823dbb7db5ad2d5131b83a2 SHA-256: d98c886926e2eac1f8e6f6036905494b28cefdee4b2eac48c054aded98e4cb28
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, while numerous, are the primary indicators of the attack pattern, directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 http://vanxuantravel.com/upload/files/mediduj.pdf In PDF document text
    • http://soldearenales.com/galeria/files/86775328973.pdfIn PDF document text
    • https://movingalpsfoundation.ch/userfiles/file/mevefolidod.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/99867466902.pdfIn PDF document text
    • https://phucatgarment.com.vn/ckfinder/userfiles/files/70449077740.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/2da427ba1b4c469380ec01ebbfc30853/zojegelufukinazuwow.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/81175533791.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/nevasenavivobaginido.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/besokokirijidoluwuxekeze.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/613a661c4892c.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/wiwede.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613eef080aaad---bekijolijudosibuxak.pdfIn PDF document text
    • http://getem.eu/files/file/sovuvagup.pdfIn PDF document text
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/wupanaxerebaluxiri.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-9/20210909112329399120.pdfIn PDF document text
    • https://tasivn.com/upload/ck/files/bupedikujawu.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136e3037627e---bokarenegesuwegavas.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9aef20031---32424882099.pdfIn PDF document text
    • http://baove24h.info/upload/files/44332058856.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/4393e15d27073dd2ffd3938a0744da88/gubilurodibi.pdfIn PDF document text
    • https://kamhosting.nl/ckfinder/userfiles/files/lesin.pdfIn PDF document text
    • http://balletpanov.com/uploads/files/tuwadilenotozomarul.pdfIn PDF document text
    • http://irvinenott.co.uk/ckfinder/userfiles/files/wasaruvasukugagovufipedo.pdfIn PDF document text
    • http://mesterteto.hu/userfiles/file/dimopidi.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/58194743130.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=explain+the+disaster+management+cyclePDF 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_off00010585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10585 11040 bytes
SHA-256: c393d4dbbf00757b1bd4f332fd6384a602e8ecb02b2b1843da916ed6da857b50
font_01_sfnt_off00011ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000136eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136EB 17256 bytes
SHA-256: 1e982bdbaa4a5ee54b3bc8fd195816b8efe7fb9a2dde4bf875da7c17bb66d133

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