Malicious PDF — malware analysis report

Static analysis result for SHA-256 292b6a9ebe1108fd…

MALICIOUS

PDF

126.0 KB Created: 2021-07-21 02:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6b1613df89708147c50ef8ec38c029d5 SHA-1: 830a2baacc1a9d92a50851b3184beebcd228c709 SHA-256: 292b6a9ebe1108fd83c01f7c59f06acf97916309925bc6474c2600c96446354e
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting an attempt to distribute malicious content or conduct phishing. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a focus on redirecting users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9869

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://school19-zav.ru/userfiles/file/56924410449.pdf In PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/28cctqkn2q76g80qcaddhs48qf/tolabasot.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/60tl0vqo0rjdmcjduo5efofm4t/58056850428.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/632e87641d67f2c992db2faea4153b8a/vunit.pdfIn PDF document text
    • https://shiokerbau1.com/contents//files/taniduxibok.pdfIn PDF document text
    • http://tele-video.ru/upload/files/xuzavidogexamiwudatiw.pdfIn PDF document text
    • https://taperagi.com/contents//files/sekepimegekitugututuke.pdfIn PDF document text
    • http://lueckerreunion2020.com/clients/e/eb/eba09433058400eda594a485f9004317/File/35378253644.pdfIn PDF document text
    • http://shssailors1969.com/clients/3/36/366f78b21138e0f8005dfe6cc5e09e30/File/95263157774.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/365d2239349c5c19d27724132983543d/losoworejukuwepelinubike.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1609858fbe203a---75007177489.pdfIn PDF document text
    • http://charivne.info/images/file/6885495672.pdfIn PDF document text
    • http://gloexdr.com/wp-content/plugins/super-forms/uploads/php/files/a999fca525c42ef43372f66c49a3a139/juladerukopepasomorivep.pdfIn PDF document text
    • http://amdind.com/userfiles/file/sutodigexut.pdfIn PDF document text
    • http://studiotecnicofrisoli.com/userfiles/files/56609746258.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16084e81266b35---lijoritewalidisidekiru.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/c6c8badd6b2752209acf9f3f5ec79b94/55723743478.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/4c6d05f309da76533ea82ae42ad2719a/pafiwe.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/6od907vr8b1ileisii2jktv1m1/56506207250.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/lebomedolowexilena.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/15827479749.pdfIn PDF document text
    • http://studioindelicato.com/userfiles/files/litoxakiladabumud.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/5965d48ec7e445a3f9c4c408f5dc7d52/18573665326.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=show+me+the+direction+of+kaabaPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00016dc3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16DC3 16704 bytes
SHA-256: aee4773202e0d4f5d8619b83a8259b393a3de220706ead9228b550847f54f5d0
font_01_sfnt_off0001855b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1855B 10920 bytes
SHA-256: 75ca51f8ad4f362563af5fc943a637a225b37a12965bfc4c6fd110dc4266d1d2
font_02_sfnt_off00019e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E8D 19540 bytes
SHA-256: da802b453e69f3e49666da1533b850b6903ed3992b054ea30ffb08989ed2f5a7
font_03_sfnt_off0001d252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D252 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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