Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7a6f3bd9e2a5bc0…

MALICIOUS

PDF

78.9 KB Created: 2021-03-30 05:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4178592dcf233070ffe012b21ae06af7 SHA-1: eac6bfde40e58d6f863f16c28de5405182f0ba0e SHA-256: f7a6f3bd9e2a5bc09d620bf61139d9d4933080aaf3395410ec4a20a3343a9fac
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as search results for documents. The ClamAV detection and ML classifier strongly indicate maliciousness, likely for phishing or malware distribution. The embedded URLs suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/award?keyword=the+antinomies+of+antonio+gramsci+pdf PDF link annotation
    • http://zopokujejisolan.getenjoyment.net/burger_king_gutscheine_oktober.pdfIn PDF document text
    • https://vobawele.weebly.com/uploads/1/3/5/3/135334277/maroforaneram.pdfIn PDF document text
    • https://zikepasut.weebly.com/uploads/1/3/4/1/134108801/goporo-famakupusiv-mosetanolibuzud.pdfIn PDF document text
    • https://zunenevalomedo.weebly.com/uploads/1/3/4/8/134855990/xutot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fabonejane.onlinewebshop.net/17050023571.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/bovewuporufunagevunenure.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/electric_guitar_lessons_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/left_breast_mri_guided_biopsy_cpt_code.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/larozovolej.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/payment_plan_terms_and_conditions_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/one_minute_manager_hindi_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/acdsee_software_free_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/larapijadoruneke.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/mopilu.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/87966903686.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/rigozitu.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/28218957995.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/lemetiwugagetedejew.pdfIn PDF document text
    • http://satogitexuvo.myartsonline.com/amaranthus_hybridus.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78F 5488 bytes
SHA-256: 85b585d77d91ee2219a130d28fd3fd31d03edb330bcc5b589553cbcf2ab4f402
font_01_sfnt_off00010a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A10 11052 bytes
SHA-256: cd3ea1a82819c9a443b3e52d3dc2a9559c107e23be434f162e75e4a838622a23

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