Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea743c250c64801…

MALICIOUS

PDF

70.3 KB Created: 2020-12-30 21:14:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 823ccaf7799d566f159b09a3952ab3e3 SHA-1: c3eb4868ade8dc5c50760cf4a4b3c8e2e6c2d1e4 SHA-256: 7ea743c250c648013fab3e9abda9e02e07e6b7ed2b7238e0dc8dada8c2cc6a04
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 heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The file contains a large number of embedded links, suggesting an attempt to lure users to external sites. While no scripts were explicitly extracted, the presence of numerous links and the ClamAV detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=himno+nacional+honduras+letra+completo In PDF document text
    • https://jawuvufos.weebly.com/uploads/1/3/4/8/134856807/xavitenikoxurev.pdfIn PDF document text
    • https://gogakasepasepun.weebly.com/uploads/1/3/4/3/134375341/7d2181.pdfIn PDF document text
    • https://mututekabifu.weebly.com/uploads/1/3/4/4/134466573/4309c.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/dfcb2a18-292c-4192-b0a5-a219dad8361c/merge_dragons_best_of_2019_event.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/71071253902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a79befa-0626-40ce-bd69-7b41646ff692/fimebiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7016f331-3a79-4c54-9021-8d546086e31f/manual_de_processo_penal_e_execuo_penal_nucci_download_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb4db061-4e6c-4e9f-a681-0ed86ee9ad95/other_words_for_great_day.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/73247477187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60060e52-3804-45b9-8f0b-8233532d454e/stachys_coccinea_mountain_red.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_off0000d376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD376 5272 bytes
SHA-256: 699105cd0c93e7292ddd62775325fbdab5ca67dab5a9d717ab5f6fcef996caf1
font_01_sfnt_off0000e52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52F 11804 bytes
SHA-256: 774c09200ad04f4458fef34b077b1f2a931bec287868312317c18267526c02c2

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