Malicious PDF — malware analysis report

Static analysis result for SHA-256 be595a6290e9c10f…

MALICIOUS

PDF

67.6 KB Created: 2020-11-10 13:25:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 07501aae178190d395e70931a116cdae SHA-1: 37ef4acb1e5f6c94c4cd5268e479a181f7b81e91 SHA-256: be595a6290e9c10feee4148e14429c356dffb75481a138bddf1acbbb977d3366
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, many of which are likely part of a link farm designed to attract traffic or distribute malicious content. The primary URL, 'https://gettraff.ru/strik?keyword=the+sinking+city+guide', suggests a lure related to a video game. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

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
  • 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.
  • 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/strik?keyword=the+sinking+city+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f8d8d7948190.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/pemuvavekenurikamik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5f9a12999971b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461249/normal_5fa6e868b63b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f873d5f2bce1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404122/normal_5f9859fa74614.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444353/normal_5fa26a7f248c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417141/normal_5faa0a1ceae4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403404/normal_5f9b38a7e890e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368954/normal_5fa7534924001.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405654/normal_5f9f5d0209b7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f8700f268399.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/2583c90a-7985-4dd5-9794-673f8571296c/lixiwidomawigapuwugonov.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_off0000cecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECD 4976 bytes
SHA-256: a866573da900e42de77a9ddd83814e7b7a7dfe585666c60dceb48e9fc65f273f
font_01_sfnt_off0000dfc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC7 9956 bytes
SHA-256: c13d6ce68afda6769aa1fcf66f193270e281ecbfaf805448492f4be1902f387a

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