Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e18c1438c276387…

MALICIOUS

PDF

86.7 KB Created: 2021-01-13 15:03:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 59f5248b7db2380d423372617cfaed3a SHA-1: 2bdb9cf177828da54327542372245be98b3f5ad1 SHA-256: 7e18c1438c276387d2c8aa98bf8e43e5569a80d6c0d667fb1b991f6465052c56
214 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 multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection scheme. The primary malicious URL identified is 'https://ggtraff.ru/aws?utm_term=aditya+hridaya+stotra+in+english+pdf', which is likely used to redirect users to a malicious site.

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://ggtraff.ru/aws?utm_term=aditya+hridaya+stotra+in+english+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4477615/normal_5fbf2fd03d8f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407777/normal_5faf8d5f941ff.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/cb6bedbbf2c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428331/normal_5fe4d47701c90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485004/normal_5ffdf104b5ea2.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovusig/W8p2VJD/how_much_does_history_channel_vault_cost.pdfIn PDF document text
    • https://zozelezike.weebly.com/uploads/1/3/4/4/134434207/12479864.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410674/normal_5fa683b1e781e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5fdb7e130ab31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417207/normal_5fad4548a13e0.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/fidefofudi/tenant_landlord_rental_agreement.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/17539963983.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/best_practice_in_accessible_tourism.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/troy_bilt_pony_riding_lawn_mower_manual.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_off000113cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CB 5396 bytes
SHA-256: d2cd718ad52772551fc7d0f71f659bda932a2f33c25ca8d7e268a322364b00c9
font_01_sfnt_off00012627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12627 11540 bytes
SHA-256: 190827b2aebcb7ff5bac8f616bfb3a887514550616c3ac69338c3777388c90e3

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