Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e729abbc4117264…

MALICIOUS

PDF

69.2 KB Created: 2021-09-18 04:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1ede08d02f350d44d13140fd04867b87 SHA-1: 4660e9e0d8c9b906c900c7b605592622b324d79d SHA-256: 5e729abbc41172644fbd2a4b93459ad4a5d696f8e0ccf326e778760a6161afea
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to potentially malicious domains, and is flagged by ClamAV as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting an attempt to obscure the true destination or spread malicious content across many sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 https://ice-group.pl/userfiles/file/343397196.pdf In PDF document text
    • http://gtlmarinefuel.com/userfiles/file/divikokusu.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/femudu.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/18085480108.pdfIn PDF document text
    • https://satellietgroep.nl/userfiles/files/gapojejex.pdfIn PDF document text
    • http://thayloilocnuoctaihanoi.net/upload/files/kisepedeziwaxizurerudi.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/29e3849a9a64fb3e5203a793347fefb1/fanukosufelazomimelumu.pdfIn PDF document text
    • http://neuchina.org/userfiles/file/norevizerovesikele.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/kefidevepexitozup.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/mimijiwelinajuwogu.pdfIn PDF document text
    • https://inprovitparaguay.com/ckfinder/userfiles/files/44232548087.pdfIn PDF document text
    • https://www.khaosanpools.org/ckfinder/userfiles/files/94539426840.pdfIn PDF document text
    • http://socukorglutamatmentesfuszer.hu/ckfinder/userfiles/files/tumatomevimimukonuja.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/katevakexuwifog.pdfIn PDF document text
    • http://steinemann-ag.ru/gevejilaligatorekipinilum.pdfIn PDF document text
    • https://gdaniec.com/upload/files/mojonijagiragudexajo.pdfIn PDF document text
    • http://placc.info/up_image/vitosomebexojevewewakinaj.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/65263509064.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/firs89jv1gu5gdhgolei7pt1di/femujowazawujaxelorujavol.pdfIn PDF document text
    • https://www.douggoodkin.com/admin/ckfinder/userfiles/files/84871742286.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/retuko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=wear+galaxy+appPDF 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_off0000b34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB34E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB60 15076 bytes
SHA-256: 307de6027affc5d9780bde7e56134e749daaaa0491017695f895b1b978f5551d
font_02_sfnt_off0000f0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EF 10052 bytes
SHA-256: 1c5d283ca3489fb80315c8425b1f26cf3c75296194c67630182b505d2bfd0d4a