Malicious PDF — malware analysis report

Static analysis result for SHA-256 28cd2cc0ac88cd9e…

MALICIOUS

PDF

71.3 KB Created: 2020-11-14 15:11:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5f1f241e55e55b4443c4fa7b1a8381aa SHA-1: 4552a8b2e2f3de99bf1d0774787175775a9b0cae SHA-256: 28cd2cc0ac88cd9ee41e914c8d6325cbe4299d7c19146de53a1277ae8f6ec970
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' indicates the document contains a large number of external links, with the primary suspicious URL being https://trafficel.ru/123?utm_term=rv+lots+for+sale+in+ga+mountains. This suggests the document's purpose is to redirect users to a network of sites, likely for phishing or to distribute further malware.

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://trafficel.ru/123?utm_term=rv+lots+for+sale+in+ga+mountains PDF link annotation
    • https://jezitazosebizag.weebly.com/uploads/1/3/4/7/134700096/xutef_dikak_kobinakafowumi_tivaguxulep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378379/normal_5f8ae705a35a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505363/normal_5faf48a3f1762.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411702/normal_5f9be92f9f39c.pdfIn PDF document text
    • https://vomediwanuxorat.weebly.com/uploads/1/3/4/3/134327005/58773cece9.pdfIn PDF document text
    • https://vajigapevinukaz.weebly.com/uploads/1/3/4/5/134578345/2483294.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5fa5c5358e2a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391621/normal_5f999533895f9.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/dadupawo/75452210453.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/ladupofe.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/cake_mania_3_free_online.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/xekodufogajivovupuke.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/lebokefopidot.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/title_page_of_project_report_example.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_off0000d8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D9 5156 bytes
SHA-256: 25bbd57130744b145a33d8aeaf0ccd17cb1c2037d7c5876b6c5940d4aa0bdc36
font_01_sfnt_off0000ea5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5C 11228 bytes
SHA-256: 038ad573aad7742827f03a37895f587abe3556bf9324c53867b257baa0d27db9

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