Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e8ce8a6c77f745…

MALICIOUS

PDF

71.8 KB Created: 2021-03-19 14:47:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 133f58fc7e6f3fec8aec7974914f13dc SHA-1: ec43535a0d7a8b0f2e3ec944c499a4144dda1dce SHA-256: 03e8ce8a6c77f7458e56afd043f96ee05d9f8f7e9126fed6bccabee9bd8a8045
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to educational content to encourage clicks on the malicious links.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pelibifir.ru/strik?utm_term=synonyms+worksheet+for+grade+3+pdf PDF link annotation
    • http://uscreditreport.info/cuantas_calorias_tiene_una_mandarina_medianaooe15.pdfIn PDF document text
    • https://cdn.sqhk.co/natokaze/heiiOgc/avatar_wolf_maker.pdfIn PDF document text
    • https://devarewiwigunum.weebly.com/uploads/1/3/2/7/132710712/nevabatisazik.pdfIn PDF document text
    • http://crysety.xyz/918633723389bi0d.pdfIn PDF document text
    • http://jushq.club/convertidor_de_grados_celsius_a_fahrvlpqh.pdfIn PDF document text
    • http://italia-doc.space/how_can_financial_modelling_be_applicable_in_sensitivity_analysisi0ja6.pdfIn PDF document text
    • https://berajuvexoru.weebly.com/uploads/1/3/1/8/131860787/tapibelag-vowobejul.pdfIn PDF document text
    • https://cdn.sqhk.co/kubabulukod/hgGhbic/super_hero_tycoon_roblox_hack_script.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/fgchcdv/storm_canis_racing_blue.pdfIn PDF document text
    • http://letxxnx.org/unity_crack_asset_store_freeswpu3.pdfIn PDF document text
    • http://tactical-jacket-sale.shop/when_did_the_canon_rebel_xt_come_outknqp3.pdfIn PDF document text
    • http://centerverifybadge.com/bafukujiwisevup120w.pdfIn PDF document text
    • https://cdn.sqhk.co/tusumawibe/lhahjya/wizegowexujerutizina.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://d19688e0-347f-4d9d-8cb3-d47c6e049f3d.filesusr.com/ugd/c618e9_f3542f9325b5470ebd727bfaa443de21.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aefddd1-0496-4f75-826a-0aded370aebe/39185816919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/395fd337-85b5-46f2-ae29-1f35d62cdd23/uglys_electrical_reference_2014_free_download.pdfIn PDF document text
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_78b3c50eb1d54d6da51323a62acc9033.pdf?index=trueIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_1123ebbab28545cbb7d0566b97f9b74e.pdf?index=trueIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_5b1c5518fe93402a8adf2bb924c0c595.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC74 5688 bytes
SHA-256: e0302bfe0136e854c8dfcd442c60c7759000fe172f442e29555ba0e0c127a744
font_01_sfnt_off0000dfb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB3 10080 bytes
SHA-256: 064b79ab186d6b3f0a4594fa24c72f9b08b217e4551ef203d98243f78587a0a0
font_02_sfnt_off00010231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10231 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.