Malicious PDF — malware analysis report

Static analysis result for SHA-256 523bcc385c968ec7…

MALICIOUS

PDF

88.0 KB Created: 2020-11-27 09:41:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 01a41e7b80777bf986451421bf52f541 SHA-1: 77b1ba8c3c6e5521eab828f365ad804394a8fd5a SHA-256: 523bcc385c968ec756618a24a5dc94d5f1bb2b0ff602555419259766623d7738
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 heuristic firings indicate this PDF is designed to redirect users to external sites, likely for phishing or to download further malicious content. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=rietstap+armorial+general+pdf In PDF document text
    • https://xuzelakojit.weebly.com/uploads/1/3/4/5/134593048/7d7899f1b9078ff.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/pupaxowor.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/c6b972f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387037/normal_5f9ca3957370d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383295/normal_5f8d6f48f0855.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401519/normal_5f962e2a94a6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393370/normal_5f948fc6cb9a3.pdfIn PDF document text
    • https://sadodirovi.weebly.com/uploads/1/3/4/8/134888529/7954516.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/8a08ec62-d8ea-47a6-8134-73fa774d6fe7/1684476356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd3a2cd2-6629-40da-afa6-f954e537ea7e/jiffy_burger_kansas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd4cf8ed-53cb-4674-a495-f80ea1ac8ba9/46214624073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa3ff2af-7d08-44c0-bac3-ad436cc04a7a/diccionario_de_etimologias_latinas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c4d4c2b-a071-4084-9884-59d34fa598e6/wudipuwegogago.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_off00011a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A96 5368 bytes
SHA-256: 534667df30bed657988e70835656188e19da931b08feb658dcb57d837ec7ca0c
font_01_sfnt_off00012cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CCA 11916 bytes
SHA-256: 959da2a7d5560c7ee8e47ab37d06b179fb99c1d06d5c684d0a1c8362c253c960

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