Malicious PDF — malware analysis report

Static analysis result for SHA-256 442df7a510b69dc3…

MALICIOUS

PDF

79.1 KB Created: 2020-11-13 20:27:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3025a3a5236e1d14859cfe920c12b79d SHA-1: d6a17aa8a59ed2f241c19f68a2ab94f43382b031 SHA-256: 442df7a510b69dc36104df70a5a7ffb1005132a4e4c66477204ef78402e00046
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain keywords related to movie streaming, suggesting a lure for phishing or malware delivery. The presence of a link farm and a critical heuristic firing for a malicious redirector strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/strik?utm_term=3+idiots+eng+sub+full+movie+watch+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5faba84661d80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f87795dbd561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405895/normal_5f9a0a729b2cb.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/8054379.pdfIn PDF document text
    • https://nukoxifade.weebly.com/uploads/1/3/4/3/134332817/d8f0376058f7eda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450630/normal_5f9f1d0845e7c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aafad55-da9d-490d-967c-daf0f961204a/lara_logan_biography.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/xasetakilawuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3b257a4-1b69-40ca-9896-814ff54f5aea/an_die_freude.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/edge_of_tomorrow_free_full_hd_1080p_online.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/brave_cazadora_de_hadas_3_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc201f9c-4ab4-47fc-9a32-d8505d40ea4a/51246199043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dba259ee-595c-40eb-81e3-e65b869a7483/jefodasu.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_off0000f838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF838 5700 bytes
SHA-256: de4f5f7810d5f6944b77a715d32321899afe88ddef356e245872a6b83cf50fb4
font_01_sfnt_off00010b8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8E 10552 bytes
SHA-256: 51bba5e5561866eb7bf6c2f0120e82e5f33a5fd234d5906b6898609d21a2adab

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