Malicious PDF — malware analysis report

Static analysis result for SHA-256 005ecaf348211bba…

MALICIOUS

PDF

85.7 KB Created: 2021-07-02 05:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: eebab4cc3ca767b0e0e15cc0e02f1675 SHA-1: 0ebf38d129095dc2ff45150f4564f35c606658ae SHA-256: 005ecaf348211bbaa2bb0ba906c60d75e3ae7c2365bec914b9b0c14481afa75d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a tactic to distribute malicious content or redirect users to phishing pages. The presence of external URIs and link farms indicates an attempt to lure victims to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://nomylo.ru/uplcv?utm_term=annual+report+templates+word PDF link annotation
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/44bd81145420fd1d1f9c9b133c7cdd7c/nosovanurejepiwijidoj.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d68cc9747---gibivaramuxigiwo.pdfIn PDF document text
    • http://seamacros.com/upload/file/gokitagaduberemojotakoli.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc87cf1f55---wikelowisatofed.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/74261699282.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/95586237795.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/7g92mjngu6cqi3a4isioudkrl5/45554055134.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/46440316277.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/01cd70a140da6d94257129010432c02d/42019310180.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/rpinelimuei7vt8carjikqvvji/27140979551.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/d682e827f4ad35cd1ecde4840245b167/30811892930.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/7h01kt1fsnoude0k43g3mp3php/52171210378.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/7cbc6735d3d9ad9a087db4e3832f158d/39576211196.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/c6ae743d476a399eed41f3159dec57d1/37132833612.pdfIn PDF document text
    • http://quaretti.it/userfiles/files/95486519590.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/lkmgg3nlveedgi7tfi3tv1jhb4/35184858978.pdfIn PDF document text
    • http://beijinghuojia.cn/userfiles/file/xovepimonesipokizexefozot.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/800e456193bf1db22a344fa4451ebf51/tewagupotuxa.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/762c7315a215ed6d17b639aaae63a3b8/ferov.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/rahbecvevqt827514av4hmg8i2/zomunabir.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/meruxazogofufev.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/01f847411b0cb18ab303908796d3e3ca/70137089109.pdfIn PDF document text
    • 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_off0000ea50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10262 17788 bytes
SHA-256: e02c281ec9e6907f28cb427bacf37b410e18db09d6a4e24efa74463a9f7d101d
font_02_sfnt_off00013114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13114 10628 bytes
SHA-256: d567bb922ca216a2382a69cc2d6760eaff03e31632bc1a37654eb48e0cf89321

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