Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce933e96fb4cb2fd…

MALICIOUS

PDF

69.6 KB Created: 2020-11-14 22:08:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a43663371b52bb44fbfbd96298753a82 SHA-1: 2f51ef70927f9b8bc6ef6fc1f90f023bd814b62c SHA-256: ce933e96fb4cb2fdeebddc13b9ae941b93baf2ea652d11452d73fafb52df72b9
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting and redirector infrastructure, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=duvet+cover+size+guide+nz In PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/sikixewebawuni.pdfIn PDF document text
    • https://kiteginizi.weebly.com/uploads/1/3/1/8/131871518/zabelifipa-zexij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_5f8836ba110c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366964/normal_5f875d067a930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381094/normal_5f8efa8a3439a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408478/normal_5fa20adbceabf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450630/normal_5fa89013a53b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455883/normal_5fa2df50d6281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411219/normal_5f99297deeca7.pdfIn PDF document text
    • https://misamizejip.weebly.com/uploads/1/3/4/3/134348089/9f85b2726ecf.pdfIn PDF document text
    • https://misikeni.weebly.com/uploads/1/3/4/3/134336029/7304821.pdfIn PDF document text
    • https://kanolapegagidil.weebly.com/uploads/1/3/4/3/134339460/6777958.pdfIn PDF document text
    • https://zopopalolidipe.weebly.com/uploads/1/3/4/5/134500843/87a035519c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/faadcdc5-50f6-4341-af1b-87f46d63e763/zofosoworolota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84efac6e-ce2c-467a-8f73-27d3ed7b38cf/rubukitupaponumosuzuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae917d26-7dce-47c0-8532-515bb5720bbf/pioneer_deh-p6700mp.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_off0000d271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD271 4972 bytes
SHA-256: e448a061feb5879745d760e05a67846e4b7e7b2b6672ec0d624ea34c08c89f17
font_01_sfnt_off0000e381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE381 11772 bytes
SHA-256: f11d9d2841fbf11ea8cb66101733df1c619cf9ceab393cd7a277e7b1576c590d

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