Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ad6923a2c90963…

MALICIOUS

PDF

84.2 KB Created: 2020-11-24 12:59:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 244ce6a4ba9edf653a9df57373be6e20 SHA-1: d6be346e74786787b3f8adaa03510626144bab9f SHA-256: f2ad6923a2c909630761da205f0e4922fce7a1ba8853770b723bf8fd6c13427f
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to known malicious redirector infrastructure. The presence of a link farm suggests an attempt to obscure the final malicious destination and potentially distribute malware or conduct phishing. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/strik?utm_term=no+man%252527s+sky+s+class+ship
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f9f644e6161d.pdf
    • https://dexatasudawuge.weebly.com/uploads/1/3/4/4/134477966/d9f79dffb443.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3583c9d9-c0db-4728-960f-e78c6e800cba/35531040484.pdf
    • https://uploads.strikinglycdn.com/files/68f68aa3-7742-452b-9397-534f2e6d24fb/rainwear_central_viewforum.pdf
    • https://uploads.strikinglycdn.com/files/29adad9e-9c64-4f15-ba81-36a9eba5494c/tera_priest_guide.pdf
    • https://uploads.strikinglycdn.com/files/a5cf1051-a0f1-4cba-bcbd-c1114ddaec0f/da_form_manual_dispatch_army.pdf
    • https://uploads.strikinglycdn.com/files/6aed01ea-9ecc-4288-9821-395bd0b450d8/ganunovax.pdf
    • https://s3.amazonaws.com/bupesejirijejus/95831737549.pdf
    • https://s3.amazonaws.com/wusigipufuvowix/bedingte_formatierung_excel_farbe_formel.pdf
    • https://uploads.strikinglycdn.com/files/e03c0861-ee96-47b4-8598-f0b40fce65b9/hum_hain_rahi_pyar_ke_mp3_free_download.pdf
    • https://uploads.strikinglycdn.com/files/9f510b44-e93d-441c-bcce-77ca211aa716/fnaf_4_download_ios_free.pdf
    • https://s3.amazonaws.com/gaxuremewuger/jivefokonemelekapov.pdf
    • https://s3.amazonaws.com/fajixe/poe_delve_guide_3._7.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c50.bin
c1d246c2027a12ee4eac5999a0eddedaa921bf23e0cc6b34495e3b5dddb87c63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C50 5248 bytes
font_01_sfnt_off00011e17.bin
e6929a0102c35265537271632ae1e5c5c19f2695be61f21b856bfab602ee6355		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E17 11040 bytes

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