Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b0f7d807eaee8f1…

MALICIOUS

PDF

69.7 KB Created: 2021-09-25 12:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 1b829f0c631c9fd8e1d0cd169aaef95c SHA-1: bca956905c1ce6f56b819cbcd6f0ae98dfc0f7bf SHA-256: 2b0f7d807eaee8f1cd46628c8ee82f7dc3792f23b93f39b6fda1f6b104a1182f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://razaviota.ir/basefile/razaviotair/files/nomezivifuvumur.pdf In PDF document text
    • http://miskolciharsona.hu/pictures/file/dogelunogako.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/fuwawitizomepipati.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/nazubonane.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/bitironutarizagale.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/32639624256.pdfIn PDF document text
    • http://myflora888.com/ck_files/files/mafoxidu.pdfIn PDF document text
    • http://dietetyka-24.pl/images/files/13269027895.pdfIn PDF document text
    • http://studiobardinisrl.com/userfiles/files/42373871432.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1613db76b37a5a---futudenonemumeri.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/memivorerukaju.pdfIn PDF document text
    • http://otczenacts.com/media/files/93442778423.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/1441903440.pdfIn PDF document text
    • http://devison-matras.ru/upload/file/72550464480.pdfIn PDF document text
    • https://mrdak.cc/uploadfile/files/zudumurawu.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/88768459359.pdfIn PDF document text
    • http://xn--or3bo5mvlb.com/data/editor/file/69904161339.pdfIn PDF document text
    • https://cukimentescukraszda.hu/files/files/tufig.pdfIn PDF document text
    • https://sibservis.com/ckfinder/userfiles/files/96785660929.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4f1dc0035---75402552786.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16142ff9c6a58f---sarusokudulepejupavuniz.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/file/kipodufimaxefelazusukobex.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/gaduxegalimenozukedu.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/gisenuxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=pocket+rally+modPDF 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_off0000b0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E1 16172 bytes
SHA-256: 96ade103e897bdde99109602976354857c7a70c9fb0148d2e8028bca1c2046a4
font_02_sfnt_off0000f238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF238 10376 bytes
SHA-256: 749e3aad45a3d45654a26819de805c826dd26b818089998c46deceec8a077cbc