Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be09dabdefee1e9…

MALICIOUS

PDF

69.5 KB Created: 2020-12-18 19:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 709ee79c751ba6da21cadd9fba93a4b7 SHA-1: e48dd86dd342947faad557329a135edecac3e715 SHA-256: 0be09dabdefee1e908e11af0ddf8e44ec5179b5647405713a1f08dbaeb968ee6
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to drive traffic to other sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/strik?utm_term=the+art+of+mackin+free+pdf PDF link annotation
    • https://pasutexovemas.weebly.com/uploads/1/3/0/9/130969198/ae905.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365539/normal_5fc5ceaa2a658.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387428/normal_5f933843232be.pdfIn PDF document text
    • https://vigajinid.weebly.com/uploads/1/3/4/8/134889024/2bc3a6734c7f64a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485321/normal_5fd91f6c068b9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc504c07848ba205d332f1e/t/5fd158aab91f50015ede1b0d/1607555242796/next_president_2020_odds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b4594ee-222d-4884-917c-4e89f788c71e/wizamasu.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/resume_template_for_freshers.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/awaken_the_giant_within_free_ebook.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea1fa8793968640865e0/t/5fc8682d13f8d93bf204120b/1606969389802/dungeon_pixel_hero_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80298e5d-aa77-422f-85f7-3a308c7c77fd/noduzolizavuburojinel.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/72927725831.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/fortnite_challenges_cheat_sheet_week_10.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/katydids_candy_company.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD31 5196 bytes
SHA-256: ec3876f0f1c0bc74c4c4d3b25de21b72e04cbc7565cb566a8b4568fabc8d77b0
font_01_sfnt_off0000ceb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB7 10600 bytes
SHA-256: 56d9c94c86f208e528df93dd7892e340e52621dc55ca6166a72abfbd6547dbd3
font_02_sfnt_off0000f2bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BC 16392 bytes
SHA-256: c9b9d40238817e9fd1c0b290bb100284b8f2d9dcc1188338581b9d27efa8fa30

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