Malicious PDF — malware analysis report

Static analysis result for SHA-256 0858944a2115d2b9…

MALICIOUS

PDF

71.9 KB Created: 2021-02-18 16:47:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 45a8388839f47c7fc04b40130ec12706 SHA-1: 3feef3e52c923f1ab3c8f279403a5ecfb6fcae42 SHA-256: 0858944a2115d2b950899fb323f76dec5f81401bd2c6533000cd3bc3800d9eb6
196 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. One of the primary URLs, 'https://maypoin.ru/strik?utm_term=roomba+discovery+4210+charger', is directly associated with the malicious verdict. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may be a precursor to delivering a password-protected payload. No scripts were extracted, but the PDF structure and numerous external links strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://maypoin.ru/strik?utm_term=roomba+discovery+4210+charger PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456135/normal_602abdc311a1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411694/normal_60170b36cd7a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484383/normal_601889f97722b.pdfIn PDF document text
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/tekuzonamijibixoruro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419415/normal_5ff3fe8d45009.pdfIn PDF document text
    • https://kisezuxuromo.weebly.com/uploads/1/3/0/7/130776201/sikepebobes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457876/normal_5fc6d1c5d453b.pdfIn PDF document text
    • http://rewuvov.iblogger.org/62074042768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405929/normal_60143ea8970ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491925/normal_5ff97aa91ae79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379731/normal_5fec17a7e78dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lepebelezoselob.rf.gd/58604329424.pdfIn PDF document text
    • http://sovotovagito.epizy.com/geometry_dash_mod_apptoko.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/krispy_kreme_oreo_cookies_and_kreme_doughnut_nutrition_facts.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/whirlpool_easytronic_stove_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/minecraft_win_10_vs_java_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/how_to_reset_kindle_fire_without_parental_control_password.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/69735489641.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/vlookup_if_error_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/pevutidolidofidelum.pdfIn PDF document text
    • http://viputuv.rf.gd/set_it_up_movie_subtitles.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_off0000d932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD932 6044 bytes
SHA-256: 6025ae4364688faa3cf1315c78c0719b64c33b209683eb02926dc0b8777628f0
font_01_sfnt_off0000edb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB2 10740 bytes
SHA-256: 07459c69b77e036e8a108b2fc21d22595493576fcf8358bc3f3267244cbfc4dd

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