Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68c674207aa7444…

MALICIOUS

PDF

75.3 KB Created: 2021-03-09 21:08:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2bd4c816a47a1aa61678722b5099e13e SHA-1: d4bd8578f82b5c099763b2d0489e99aabb86faa8 SHA-256: b68c674207aa7444352a6b5e67ae31781a77cd7ec66cabce5cdc083a4f82c77d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, including one to 'nipisod.ru/strik', suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, appears to be a lure related to pairing a Roku TV remote, a common tactic for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://nipisod.ru/strik?utm_term=how+to+pair+a+remote+to+a+roku+tv PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383915/normal_600858ab6a1d7.pdfIn PDF document text
    • https://woloxujujesif.weebly.com/uploads/1/3/4/7/134716607/kadawefotefubam-biwevinozul.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/bosch_silence_plus_error_code_15.pdfIn PDF document text
    • https://romarifekaxa.weebly.com/uploads/1/3/2/6/132683260/1a42122c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381081/normal_602d8e1137ad3.pdfIn PDF document text
    • http://dasiwujupuna.sportsontheweb.net/35354513322.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/fun_dd_one_shot_ideas.pdfIn PDF document text
    • https://junobinedutuki.weebly.com/uploads/1/3/2/7/132712306/2530769.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/50210808591.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/murray_6.5_hp_lawn_mower_spark_plug.pdfIn PDF document text
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/e4fa41e.pdfIn PDF document text
    • http://zapitexidij.mypressonline.com/65338599042.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477886/normal_6003b29203ed1.pdfIn PDF document text
    • http://bulakirip.getenjoyment.net/creo_parametric_5._0_tutorial.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465249/normal_5fc5f18cd6b4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418762/normal_6007971ed506a.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/dazuxujepov/32423579569.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/jamutababobejogudo.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/tusekozekitiwofirinakuwod.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/john_lewis_bed_sheets_small_double.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/22059688378.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/esc_guidelines_infective_endocarditis_2015.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/seberoposejukogaxebo.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/athiran_song_pavizha_mazha.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/block_strike_mod_apk_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/cursos_en_espanol_en_miami_dade_college.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_off0000eae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE3 4932 bytes
SHA-256: 97da6cf05629ee6bb09881b564d57eea245c94d456e13e0382ab40d7455e1fa4
font_01_sfnt_off0000fbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAA 10552 bytes
SHA-256: 7db73cb5eef92a8fb555abdf101df5c086fa381a051e4fab617c663d42075f65

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