Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a0d901682e76be…

MALICIOUS

PDF

76.4 KB Created: 2020-12-25 20:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bcb05b64975bd25f0cd196f0ee58e465 SHA-1: bbfc7738b1920a1d61c5675fecc51d71c5e14a55 SHA-256: 49a0d901682e76be1d943cbb03787350f4df72a82830f1e51d02271db570a237
194 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 a redirector link to known malicious infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URL, https://ggtraff.ru/strik?utm_term=gamma+horizon+mobile+application, is identified as a redirector, suggesting the document's primary purpose is to lead users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?utm_term=gamma+horizon+mobile+application In PDF document text
    • https://cdn-cms.f-static.net/uploads/4479222/normal_5fa602d865632.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413244/normal_5f984b0215731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f8b4f347796b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408706/normal_5f9dd7a12ffbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372354/normal_5fa45730160c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473619/normal_5fd1cc507a063.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384468/normal_5fb74d58e3413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475985/normal_5fd6230074fae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f9b6b6467228.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/wutezigojuxi/minority_report_4k_hdr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a5ca530-04ff-46f6-af25-aab0637cf89d/62094567783.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/capitalize_text_google_sheets.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_off0000efce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCE 5216 bytes
SHA-256: 797edb059f1408ef05b13104ca7e5e80d20bec2dae79da91b330e221e365508d
font_01_sfnt_off0001016a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016A 10500 bytes
SHA-256: f1776885559bd8b57fe0138c9cdcdbe44913c53387ba09e96a72a39469f819f6

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