Malicious PDF — malware analysis report

Static analysis result for SHA-256 65fb89effa9923c4…

MALICIOUS

PDF

202.4 KB Created: 2021-06-10 02:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2239c4a60630b5c25d1b55017b04006f SHA-1: 59b39c1ef02b8a4f3723e416843c1989315c8de1 SHA-256: 65fb89effa9923c495bdb480f8b44e5d8983b4d70237c40fdf422fa4e42ad985
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious files. The ML classifier strongly indicated maliciousness, and the presence of external URIs suggests an attempt to redirect the user to a secondary malicious resource. No scripts were extracted, but the overall structure and heuristic firings point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 4

  • 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.
  • 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://laborke.ru/uplcv?utm_term=life+and+death+twilight+reimagined+pdf+online PDF link annotation
    • http://aarogyamedico.com/userfiles/file/magopas.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/duxilavawowosefivosutubuk.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/c0067e896b43be2ea4555bbca8eda0f6/tumivirobanipezik.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609948d05e6e5---20956833259.pdfIn PDF document text
    • https://sharadsangam.org/UserFilesTwo/file/vuvepi.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/04d3267e58b4b8c48389e5c3e288bf14/wixaluxewajami.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd7be82265---6446795342.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/7dc0bd4e8c9762fcd0922861db64b2bb/80366593403.pdfIn PDF document text
    • https://szaktel.hu/uploads/file/29160249373.pdfIn PDF document text
    • http://short-story.ru/upload/file/tofafurewaxogaworafu.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/9f91b0538cf83827904ec26778e4cc66/mubiforik.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a125b1757fa---nofuw.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1df2abc8f---xafepu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb07fd72a7---mufofexibataxevi.pdfIn PDF document text
    • https://bevelec.com/bevelec/dossierMois/file/24421021007.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002e399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E399 5312 bytes
SHA-256: 4c90af04e7527c62d625844d6e0e119cf00464c66531f0e5303396b625435210
font_01_sfnt_off0002f595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F595 10972 bytes
SHA-256: d2ca0489fe2a076ec6897b79a82858b35166516664764088bf3198e9e947ec0b

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