Malicious PDF — malware analysis report

Static analysis result for SHA-256 73ea1a79a336220b…

MALICIOUS

PDF

77.2 KB Created: 2021-02-07 10:53:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 988cbb80938b95b9b55ce7a498110a27 SHA-1: b19f8ba77dea5e41bf71ba2a95b4ec3e5c141f60 SHA-256: 73ea1a79a336220b75b17bee8358225c9e03276027b6bc34462aa41acd665326
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jacksth.ru/wb?keyword=excerpt%20from%20blue%20jasmine%20answer%20key PDF link annotation
    • https://cdn.sqhk.co/sivunukiwe/jburue9/tuxelozufudodazoduzej.pdfIn PDF document text
    • https://vusexojepaxeva.weebly.com/uploads/1/3/4/0/134096357/labix-bovofureju.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/gfF9ToX/14_gauge_checker_plate.pdfIn PDF document text
    • https://jinikegubu.weebly.com/uploads/1/3/4/8/134873825/9970875.pdfIn PDF document text
    • https://balesiloruj.weebly.com/uploads/1/3/4/6/134671801/tuzujevu.pdfIn PDF document text
    • http://govnosiakxws.online/vuviraxi91tc7.pdfIn PDF document text
    • https://nolulanulupu.weebly.com/uploads/1/3/1/3/131379612/litopidagobusu_kodekodemuti_vigopoki_fofanutekajizeg.pdfIn PDF document text
    • https://lizulamuti.weebly.com/uploads/1/3/1/6/131607093/be8f84631d2.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/iY2ISii/microsoft_news_app_review.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/dzvemgf/gudibiw.pdfIn PDF document text
    • https://cdn.sqhk.co/tatomaxeriri/geUZhay/electric_guitar_learning_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/ghibarX/8964390293.pdfIn PDF document text
    • http://hrushch.space/bubble_witch_saga_3_free_download_for_androidwxh96.pdfIn PDF document text
    • https://jejaxeka.weebly.com/uploads/1/3/0/7/130739175/4793028.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/livivuvuwugeb/numetuvevejetamimiduto.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_off0000ef6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6D 5660 bytes
SHA-256: a30b7ec2df0d155d5d5c7554e71d3212b771deca8dc95b684bf7406b0f8e2b68
font_01_sfnt_off000102ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BA 10984 bytes
SHA-256: d82338519756087bb320249772f169c793107967a0aed11e3c4f50977b252ced