Malicious PDF — malware analysis report

Static analysis result for SHA-256 de1860d8df064aad…

MALICIOUS

PDF

72.2 KB Created: 2021-03-02 19:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: dd5e4f3cfee4077354046e547f88392f SHA-1: 4b204ad575f4eeb02eaa963cb536f7b6965e8aba SHA-256: de1860d8df064aad2b8fb1f976fe164ac1abd2c4ebf8baf366dad1d6b22257f5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a PDF link farm designed for SEO. One of the primary external links points to a URL that appears to be a malicious domain, likely serving as a distribution point for further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=them+belly+full+ukulele+chords PDF link annotation
    • https://jojiwunu.weebly.com/uploads/1/3/5/3/135387754/nepudix.pdfIn PDF document text
    • http://lnstagramcopyrightservices.org/78592111054tt2hm.pdfIn PDF document text
    • https://kuzapulekoxiror.weebly.com/uploads/1/3/2/6/132681507/7919198.pdfIn PDF document text
    • http://ruboperuba.iblogger.org/world_war_z_game_characters_wiki.pdfIn PDF document text
    • https://zibesotisudub.weebly.com/uploads/1/3/5/9/135996238/firirazilebisomusoxu.pdfIn PDF document text
    • https://davufafelasipip.weebly.com/uploads/1/3/4/3/134328138/fabekan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nokizotef.rf.gd/28195740506.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/pure_tone_audiometry_test_report.pdfIn PDF document text
    • http://sewekovekejir.epizy.com/galarian_forms_weezing_ability.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/free_cakewalk_sonar_studio_recording_software.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/mcafee_antivirus_cracked_version-_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/excel_subnet_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/autocad_2020_trial_version_free.pdfIn PDF document text
    • http://livofos.epizy.com/factoring_by_gcf_worksheet_answers.pdfIn PDF document text
    • http://labireninofut.epizy.com/muzev.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/jaspersoft_studio_report_example.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_off0000dc59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC59 5304 bytes
SHA-256: 6853dfc398d6b59792ff140759a693cc4eec96a4bd0c41f97e93bb4fbc9cef90
font_01_sfnt_off0000ee49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE49 11032 bytes
SHA-256: 99126aff4c6abbfb6f26e573215b98fbdc5c2e0813e78b2dcb0296da19fe261c

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