Malicious PDF — malware analysis report

Static analysis result for SHA-256 c36e8adbdcf7d130…

MALICIOUS

PDF

77.9 KB Created: 2021-02-27 13:55:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 608d82063a68a3d493048238c7595108 SHA-1: ae8451457fb2299c2a8ab68f822a357a3ec9c606 SHA-256: c36e8adbdcf7d1304a50f6b412575bb190d0c996c52158cb5c4f4bc6ae7bdaf4
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body, though truncated, contains text related to 'The rules of the game book' and application metadata, likely serving as a lure.

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://baarspo.ru/strik?utm_term=the+rules+of+the+game+book PDF link annotation
    • https://zivexuxa.weebly.com/uploads/1/3/1/8/131871677/nolidugox.pdfIn PDF document text
    • https://vujojetusifej.weebly.com/uploads/1/3/1/3/131398487/571319.pdfIn PDF document text
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/sigidogokom.pdfIn PDF document text
    • https://juladugalevatib.weebly.com/uploads/1/3/4/3/134385664/fomojapewofexu.pdfIn PDF document text
    • http://xatujazaxuta.iblogger.org/disadvantages_of_probability_sampling.pdfIn PDF document text
    • https://lurufabufukigo.weebly.com/uploads/1/3/1/4/131407807/vevemafafa.pdfIn PDF document text
    • http://puwisagoki.22web.org/love_break_up_video.pdfIn PDF document text
    • https://jilefufut.weebly.com/uploads/1/3/4/1/134109271/xolugapiwadi.pdfIn PDF document text
    • http://kumululurug.scienceontheweb.net/kavidano.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/filled_up_appraisal_form_sample.pdfIn PDF document text
    • http://likutolejit.onlinewebshop.net/is_cultural_imperialism_bad.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/goketaxunewabif.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/kebudi.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/business_dictionary.pdfIn PDF document text
    • http://xiwagopa.epizy.com/lekaguvakex.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/72236278100.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/king_size_platform_bed_frame_with_drawers.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/attention_span_test_questionnaire.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_off0000f5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CE 5336 bytes
SHA-256: 243396198efd8099e9f819ef7588629f7fd8ad98d408a8a9448a943d9f2e33aa
font_01_sfnt_off000107c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C7 10112 bytes
SHA-256: bfcfab62c1439a3f5cc24c92d5a4d4608d247851288231c537da2277936f67d7

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