Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ecc24997685ca5…

MALICIOUS

PDF

79.8 KB Created: 2020-12-24 13:04:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 63eeb841c961de1a00af1e6907ee7c8f SHA-1: 7e323dcae50eedb0b9ebbb01cc60cd040685f294 SHA-256: 93ecc24997685ca5792ae268467706591140777c7f1a9f4820f58892f510e8e6
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm designed to redirect users to potentially malicious sites. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. The ML classifier and ClamAV detection further support the malicious nature of this document.

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://traffine.ru/strik?utm_term=bmc+software+houston+tx+phone+number In PDF document text
    • https://cdn.sqhk.co/miwiwefe/7Gjhij2/traffic_racer_download_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/merodobiweve/haI60hb/mudunedipavu.pdfIn PDF document text
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/f9a6b350c5a98.pdfIn PDF document text
    • https://sawobefuridavo.weebly.com/uploads/1/3/4/8/134895752/2310484.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/susopuzupure/adverb_of_degree_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/vubolotiporefatosa.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/bootstrap_html_templates_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/adobe_audition_full_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6101fdea-623e-460a-aca7-6ff0b86033ae/metal_slug_6_ps2.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/42089521613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b3dd9d5-344f-4ba5-a3bf-4c1c1a945f18/meggs_history_of_graphic_design_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/67235983486.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/windows_10_iot_enterprise_ltsb.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/forward_contract_act.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_off0000fb5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5A 5572 bytes
SHA-256: aadcd26df929dfe4b6eeae995a92c8999b3f7b85efe11edcc514102358eb2e72
font_01_sfnt_off00010e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3B 10460 bytes
SHA-256: 083e74f557af2a370fe0b2b1ed379a101f940c56f28345070a4acb3211c94373

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