Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3adaa33054beb52…

MALICIOUS

PDF

89.0 KB Created: 2021-08-25 03:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: af48f74d11a6066525eca472c4339d9e SHA-1: f6fff4c6f1ab8471b7d291535d33554c5e96a219 SHA-256: e3adaa33054beb52b50e4efec4f68cae2ba61907accf12a78d60cfab7a26ca87
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, a common technique for distributing malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs suggest a redirection mechanism, likely to lure users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/3p849qllotp2h0an92qpekb2ar/wapelupivezedizojoludako.pdf In PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095b2b6a8571---57602584517.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/zoxiwuvipagedo.pdfIn PDF document text
    • https://migger.dk/userimages/file/90581684555.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/mopoxojenofelivinowuved.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/miboxefojakopozexokok.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/redufi.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160963a0b53baf---8121545886.pdfIn PDF document text
    • https://unserbiokorb.ch/userfiles/file/42710477527.pdfIn PDF document text
    • http://pinxedien.net/upload/files/sunonaxeda.pdfIn PDF document text
    • https://sibconsulting.com/contents//files/zoxekuzeb.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a30d8e827e5---80016107366.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/17580297145.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbd5681ba9---73478212364.pdfIn PDF document text
    • http://nfc.soo.jp/file/13091094147.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609069e1d1c8a---nokow.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c3e2163b55---35698304172.pdfIn PDF document text
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/jitodepadoduzodis.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845f5197538---94986965157.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/38f2c8c937b7d168a5ef0edb387f178b/76183565889.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/koqdja0ihr1lc5os6tv5kr9cjg/vegeda.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/revopibodurovojowob.pdfIn PDF document text
    • http://brenderup.ro/mm/file/42462432056.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=the+dictionary+of+body+language+download+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_off0000f6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D8 11132 bytes
SHA-256: 55d9bd2d303a0e7abf0b30f0bcc8bc05a9f98e62f243b37b843f38900628539d
font_01_sfnt_off00011069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11069 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001287b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1287B 17472 bytes
SHA-256: c095b55f4e4a7f63920b57a53385bd555fcb37a88e54c2e6f50a4fbabc61ee8b

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