Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b2a6c70a20cdb3…

MALICIOUS

PDF

94.0 KB Created: 2021-09-04 01:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7f1416a21c6539cea246c9f398e9ef6f SHA-1: 06dd5454030e4cff6452d5ff7fdc1d618c9fb3fa SHA-256: 60b2a6c70a20cdb3a4efc5393885aae9970222472162a7dba09ca5ebc676cca4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://richmediahouse.com/admin/uploads/file/putinivemogodivot.pdf In PDF document text
    • http://dyglas.com/userData/board/file/nukitefeninelokax.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16080d4a39cd4b---83140887561.pdfIn PDF document text
    • http://jl-vacuum.com/upload/files/25784408678.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607974887d5a6---69610056821.pdfIn PDF document text
    • http://ofipapel.org//ckfinder/userfiles/files/33703758264.pdfIn PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/vonefenam.pdfIn PDF document text
    • https://superpart.com/files/zapofavukimojore.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/lazesidavetugalumokajasuj.pdfIn PDF document text
    • https://rubenferro.com/userfiles/file/39747721080.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a35ca58c7e---9098728403.pdfIn PDF document text
    • http://waterreducer.cn/d/files/pojazaroremobasipezek.pdfIn PDF document text
    • https://www.corpeverest.com/ckfinder/userfiles/files/53050053711.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/pkt7j7do5lq3t9p767rqutcka1/7486586019.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16090e3d5bad36---tixinavawigejujabo.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b297670e96aaf96132273c851548ea66/ditakorumugubuxalinisu.pdfIn PDF document text
    • http://studioarchterreni.it/userfiles/files/matodagepazogenabejopug.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5a829a02f---zapufojizabosabese.pdfIn PDF document text
    • http://rileyillustration.com/images/agency/files/rabazikalajevum.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/veliboxebolezamefub.pdfIn PDF document text
    • http://hsound.ro/images/custom/file/41823627741.pdfIn PDF document text
    • http://sinhorelli.com/userfiles/file/fowuxegisi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=ejercicios+pasado+regular+ingles+pdfPDF 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_off0000ff5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5E 22960 bytes
SHA-256: 4add892b5afe8938ed6766b53116f9c0480823ae4d957869d5d541e9463ef609
font_01_sfnt_off00013933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13933 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001514a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1514A 10912 bytes
SHA-256: d99043a57c00d4774cc5cc3398c7a18cd135854aea7a50fc54d0f63460ddc5f9

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