Malicious PDF — malware analysis report

Static analysis result for SHA-256 42567abdc424fa40…

MALICIOUS

PDF

86.1 KB Created: 2021-07-08 18:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8f77d61271730e74b37d1ad5c70c5c61 SHA-1: e817a4d2d01737b4817c3d647497ff541aa459c0 SHA-256: 42567abdc424fa40d70fc9b7fb4f1c0714fffd9f8c80b4dd3cd84f87ee56aac9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, as indicated by the 'SE_INVOICE_LURE' heuristic and the presence of numerous links to potentially compromised websites. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the structure suggests it may attempt to download a second-stage payload from one of the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/bglecte6r6ovd3kfn7k3nkatp2/pirate.pdf In PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9878188ab---dorozejum.pdfIn PDF document text
    • http://hzbaoyan.com/images/upload/File/manusujunopulemakunaj.pdfIn PDF document text
    • http://24cvety.ru/upload/files/fidogajo.pdfIn PDF document text
    • https://activepymes.com/pub/file/kujakidabemalegu.pdfIn PDF document text
    • http://oilandgaswork.com/userfiles/file/43018526323.pdfIn PDF document text
    • http://puppiesulove.com/clients/7/7f/7fa6d7836ea929643a3c23f4562b158d/File/xujevetilotizod.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/29669659177.pdfIn PDF document text
    • http://abnicum.ru/files/file/jegukopejuxumobusaza.pdfIn PDF document text
    • http://whatdwellswithin.com/file/80027868062.pdfIn PDF document text
    • http://worldwidefilipinoalliance.com/uploadedFiles/files/gekugodowebawometekiloz.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/nuxikexaduwexu.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/94792148435.pdfIn PDF document text
    • http://angeladaniel.eu/uploads/files/93896379474.pdfIn PDF document text
    • http://massimoandyuethui.com/clients/69227/File/65592118855.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/wajuvamilonodukezexa.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/lagebolidumikofoxite.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/30823087448.pdfIn PDF document text
    • http://juha.be/_files/file/mimexakuseneza.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb32d0895b---34149265481.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2cf513086---tipipufaparopimasab.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba38ada2860---gumamo.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/e654a02900a626c91e8943c567caa28c/tabigegox.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc1e2377cf---jatalede.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/55368056222.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=bill+to+ship+to+modelPDF 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_off0000ed68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED68 10344 bytes
SHA-256: 08fa3621e36d8986e4f2e3baddf5f07fda11f766d21247c2534fbd0cd742dc03
font_01_sfnt_off000104c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD5 17772 bytes
SHA-256: e189a731990678a26a3e4d5e59d08e52a1200cba9a158b16fff4323e047f7435

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