Malicious PDF — malware analysis report

Static analysis result for SHA-256 f357097441d3ae54…

MALICIOUS

PDF

59.3 KB Created: 2020-11-18 04:30:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0f358ead9ce71ae177baf2f2cc084975 SHA-1: 9180cf6058f662e5c120a282c15569d326af51ab SHA-256: f357097441d3ae54b06acc79f5a5be4e379cab98b5b00ccaa973ff44fd51b1f3
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=lucio+gasparetti+south+holland+bakery+supply+crete+il+60417 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4463298/normal_5fad7a4da4751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f87608c48168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405674/normal_5f94bfe992792.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_5f9dddbc0fa77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375355/normal_5f90ef2e15698.pdfIn PDF document text
    • https://kejedaxuz.weebly.com/uploads/1/3/4/3/134355680/sakidupewulo.pdfIn PDF document text
    • https://vewawuwidavejo.weebly.com/uploads/1/3/4/4/134403009/8153709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470689/normal_5fb011d20b584.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/foneniz/38454009351.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/23180165213.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/vegusebuweludogalevemamek.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/razoronorux.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/5th_kalma_mp3_download.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_off0000ab54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB54 6096 bytes
SHA-256: 38c74821ab7b7d7176e27cb070403797f57fb7031bde4a2555f1346595cd482d
font_01_sfnt_off0000c02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC02C 9320 bytes
SHA-256: d4473df07ee3da6801d76489fb7e0bdd31df9692cb5a1f3cac820ae2d2a40f85

Open this report in the interactive analyzer, or submit your own file for analysis.