Malicious PDF — malware analysis report

Static analysis result for SHA-256 c945bc0ebbc4052c…

MALICIOUS

PDF

75.6 KB Created: 2021-05-12 06:18:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6bd7a186bb86e404fea441f121e916d7 SHA-1: 7448d713dd8543f5fc4eada426219be6e70bf051 SHA-256: c945bc0ebbc4052c09a578fa2c1d00dda6eccac6b6c36c5334ce736adf576591
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a link farm pointing to 'http://zetamox.epizy.com/51792735615.pdf'. The ML classifier and ClamAV detection strongly indicate maliciousness, specifically flagging it as 'Pdf.Phishing.Trojan'. The embedded URL 'https://dugedepap.ru/strik?utm_term=how+to+use+bissell+big+green+professional+carpet+cleaner+machine+86t3' likely serves as a lure to a malicious site.

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://dugedepap.ru/strik?utm_term=how+to+use+bissell+big+green+professional+carpet+cleaner+machine+86t3 PDF link annotation
    • https://cdn.sqhk.co/jeforije/fYAPqG7/cute_octopus_drawing_step_by_step.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/cC37vzv/97752644581.pdfIn PDF document text
    • https://mumanewuneju.weebly.com/uploads/1/3/2/7/132712109/642d1cd4babf4a.pdfIn PDF document text
    • https://vizifota.weebly.com/uploads/1/3/0/9/130969876/gomekafijarus.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/jjihfpz/9852748199.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zetamox.epizy.com/51792735615.pdfIn PDF document text
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_ce2f8ce8378c4918b77f29d6d397cbde.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/filmora_9_apk_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/jefujafebe.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/jadujekemerev.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/how_to_set_up_firestick_remote_to_control_tv.pdfIn PDF document text
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_7613399ea90742e9b12c9377cb7b3b7f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fedure/chimney_liner_sizing_guide.pdfIn PDF document text
    • http://zibinafo.rf.gd/hollow_block_making_machine_manual.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_off0000e45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45E 6132 bytes
SHA-256: 4843f596bf16beb1c2a5c6bb1bcad236536b64154a95135ff63af5652e0cada2
font_01_sfnt_off0000f918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF918 11080 bytes
SHA-256: 01739e79c9fa3e6de3402d5e779f3b2e5535808afd4d418d229510906baa6bfa

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