Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e443f2a7cf7dc9f…

MALICIOUS

PDF

94.6 KB Created: 2021-02-23 21:28:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: d79446468cc886aad938176a86658edc SHA-1: 2956dd15611ae87bc0bff5ed7f8bda119fe0a016 SHA-256: 4e443f2a7cf7dc9f6d6eb989b7ebd84f4c2e55084802559994430a766e86869a
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm heuristic, pointing to various domains. The ClamAV detection and ML classifier strongly indicate maliciousness, with the primary purpose appearing to be directing users to potentially harmful content or phishing sites. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to leverage web content for malicious purposes, likely related to phishing or malware distribution.

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 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://maypoin.ru/strik?utm_term=what+does+the+myth+of+pandora%2527s+box+explain PDF link annotation
    • https://malavaxun.weebly.com/uploads/1/3/4/0/134018228/mejegiw.pdfIn PDF document text
    • https://pupikitonusu.weebly.com/uploads/1/3/5/3/135301263/5429791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482618/normal_5fd144bb029cf.pdfIn PDF document text
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/4603780.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/VJmicig/wordscapes_level_8044.pdfIn PDF document text
    • https://cdn.sqhk.co/jozazixefuf/bgehghc/download_stickman_destruction_4_annihilation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378410/normal_6027d88c918d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444113/normal_600522b1d4f93.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/jujadodedaruxix/gupavalazopobu.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/free_time_card_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/belajar_pivot_table_excel_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/45601105629.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/gepafomitofez.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/serenade_melancolique_tchaikovsky_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/brownie_uniform_john_lewis.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/former_australian_cricket_team_captain.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/english_to_chichewa_dictionary_apk.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_off00012cfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFA 5636 bytes
SHA-256: 2f0f71a3c6e850a3e31f15acc911118e62d7bac8b0a5353cf810f2a7d53459cc
font_01_sfnt_off00014016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14016 13900 bytes
SHA-256: f6aab2a143e8ce033c1eea0ad62cb9336e7a7c7da16a1ee857a117967b2b3468

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