Malicious PDF — malware analysis report

Static analysis result for SHA-256 342396e6dd7a10d1…

MALICIOUS

PDF

66.4 KB Created: 2020-12-15 06:36:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4c56f5303e123574d17ed6d622cdfcd0 SHA-1: 4311a1e18f49170f1c17dcf8689bdacd650e74e5 SHA-256: 342396e6dd7a10d1167f74b07d30dee6727ccd271387d0398b7e2324025a86a0
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 detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or SEO manipulation tactic. The primary malicious URLs identified are trafffi.ru and a Weebly hosted PDF, likely used to redirect users to further malicious content.

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://trafffi.ru/strik?utm_term=aimersoft+dvd+ripper+review PDF link annotation
    • https://lufisadoxusixa.weebly.com/uploads/1/3/4/5/134583632/dumugezavarevi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377936/normal_5fa114b2cf13e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489713/normal_5faaf76ad900d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372707/normal_5f8d902d46271.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448538/normal_5fa7aae1a0e3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f926c6967d81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc784a563393450185475e5/t/5fca3a5987b36f46d40a80fb/1607088730114/sprint_stock_news_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/dixuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/carrion_crawler_mucus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d95c3398ff75154720e4/t/5fc62649e18c5c478eccee0a/1606821450761/bogasupisesepidulufonanif.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/52808103683.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_off0000c765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC765 5088 bytes
SHA-256: 7752563efb050c982c50d93a44acd1416db386b0e16379562b8c13b5406bd03b
font_01_sfnt_off0000d8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B4 10772 bytes
SHA-256: 9081fd8ad70e4bde93574d0025402d2b0e83e78154a45d4428b3f2794d1a0187

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