Malicious PDF — malware analysis report

Static analysis result for SHA-256 147a0c20484ae2f6…

MALICIOUS

PDF

98.1 KB Created: 2021-08-21 12:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 861b797390091bd153cde3ac212b6469 SHA-1: 746e1b17370ddaa6a4b668712bde8b61f08e14a4 SHA-256: 147a0c20484ae2f66a38fa9b1b66dfcfe7d012d361d10f7bf49962553758ab46
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9889

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=life+of+pi+full+movie+in+hindi+hd+480p+download+filmywap PDF link annotation
    • http://shethof.ch/cgi-bin/dynamisch/file/gimevexugimopevik.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611124ed8a6d4---nusakapojusu.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082913799e02---ziwuvu.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/ad05367b775745ccf783feff65bcbe62/wawarigiwewedejoniwogotid.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/1ee0c0eab241b6acd94070680e06bb5c/gigerijikasokozaketexejub.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076bd77b8758---27588335441.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210724_01422F8AAFD232ED.pdfIn PDF document text
    • http://northjerseyseniormenssoftballleague.com/clients/2/22/22e10641a135963e7b476298ec508c3c/File/wagakevuvapexu.pdfIn PDF document text
    • https://hamzakocakoglu.com/userfiles/file/xajegewulolet.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1f245d285---nevinoritol.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/fa6e8e968fb0ecfa8a24b29d32c6af82/58105471263.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/79159966407.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/51610905643.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160af9fd9eda3c---81215890081.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/oto95ipvh9gm5kbe0ii0u24eoo/zitoloninerobanuj.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608012cc742e7---13935466546.pdfIn PDF document text
    • http://ipublicity.cz/data/file/96281578289.pdfIn PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/869e5e413bc3cb1b67fe47b22125f9ad/fatupoxigirexamaxew.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/9lob8vkqic55q12kmutus6pur0/zarumo.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/melenisadogifonekekije.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/muguzuratidatulavinulafum.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/kaguwonabedajaveboteso.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/9459962364984c6786ee78a3dd92b2e7/50589825843.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ad7e6e084---35352338912.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/wotuwawuf.pdfIn PDF document text
    • http://garage-ys.info/js/upload/files/58731056701.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_off0001197f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197F 17356 bytes
SHA-256: 22359054fcf9ba94a039eebd59a2f4fe25f0640b4ee8f0f8de2d18bbc31811e4
font_01_sfnt_off000146e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146E8 11128 bytes
SHA-256: f9887a8cacc65cb145df64d93864f5757aaa49add29b08dacbe00a24d3b29758
font_02_sfnt_off000160ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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