Malicious PDF — malware analysis report

Static analysis result for SHA-256 c99b97253d571fca…

MALICIOUS

PDF

70.4 KB Created: 2020-12-17 01:51:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2e6b88cf3b912231c41e5c3409c2f3f5 SHA-1: 4f12a7676b253320be87b47504de0adadd0b1c39 SHA-256: c99b97253d571fca0652b12056a068d447411dd551b217bf4b91794cc2c1ac1a
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 by multiple critical heuristics as malicious, including a link to known malicious redirector infrastructure and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest an attempt to redirect users to potentially harmful sites, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/strik?utm_term=the+beautiful+things+that+heaven+bears In PDF document text
    • https://xovatikawe.weebly.com/uploads/1/3/4/7/134726086/musutixitavik_ganiwe_kanuraza.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wewebunovemerifabo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460954/normal_5fb9984d1870d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474992/normal_5fad77702fb01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454965/normal_5fb53dff0ef2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408481/normal_5f9a40db74be3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423136/normal_5fb3d1b9ebb2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488822/normal_5fb2b978460a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5fa89e1fde080.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/dikobepibelun/commandos_game_free_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/amu_entrance_form_for_class_11_2019.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DE 5176 bytes
SHA-256: fa770801a48fb4f597e8225562805f0d120ac5d291ee559e5ccea3890d7c40b7
font_01_sfnt_off0000e882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE882 10844 bytes
SHA-256: 9ed6ff9f6d673fc5cfc519a9adfbc74a87bece36df973a29df2dc9fa820bd2eb

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