Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60e48d4fb3cc4ce…

MALICIOUS

PDF

84.7 KB Created: 2021-07-19 10:34:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 345725cedc4af9d544933ffb249dc239 SHA-1: 93274274ad5a101942dc1db1e5e3354d45c47db8 SHA-256: e60e48d4fb3cc4cede7dfef2d220e699929d0c0dc1ed18d2398e35c13daf07aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malware or conduct phishing. The embedded URL, while marked as benign, is part of a larger pattern of suspicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dzstock.com/Upfiles/file/memalemotamawe.pdf In PDF document text
    • http://capableapp.com/uploads/files/58345240776.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/mudujexig.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/98fef8a4e828e49934aa94e4924b4db0/givisiwiwitaropiba.pdfIn PDF document text
    • https://aviseco.ro/userfiles/file/rekevini.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/mofefag.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0240b99785---9438894993.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/45auhpjct7t3pet0nmekgtrcnm/kuzedejagopavanatafezo.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/65686306880.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c878493e628---56849828698.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/1656764712.pdfIn PDF document text
    • http://dothanhigh1970.com/clients/6/63/63ba8bdc6fdca46b25bb56d5732eafc9/File/xaguzepaje.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082514eadacc---nagesosunukoderexur.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800870e3f6b---39288090913.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/46516517531.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/43616766958.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d12ae3d79---8901144868.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/gurupufuresivaxunejusu.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/dba956a4413d45e48bff74aa5af9e88b/52511429906.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/94872310366.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/futf7juauqstrbtkfvo9l0k4p3/bipuzepiwakaru.pdfIn PDF document text
    • http://pytextiles.com/userfiles/file/salejuzazozexas.pdfIn PDF document text
    • http://tindangnhadat.vn/upload/files/69009063800.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=download+minecraft+free+for+windows+10PDF 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_off0000e99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99A 16416 bytes
SHA-256: c646a297600e3408df9898d9f88947005b2adb091c647fd81af6f4a998545ac7
font_01_sfnt_off00011404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11404 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1B 10896 bytes
SHA-256: 9c688bb643c725e12e678d3f55093193f0bebe1a6e4310b605eb67ef47b31bb6

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