Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c501d94707974e1…

MALICIOUS

PDF

63.9 KB Created: 2020-11-14 12:08:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b6ca96bfb9bf2dfed0610cd5fe26a8f9 SHA-1: 5cea6485122f97605e5ca3da461f980adbcb8cc0 SHA-256: 4c501d94707974e1eae7e632e2cc3f73031cf788838b971386ea3990b587c1d4
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a deliberate attempt to host or redirect to malicious content. While no scripts were extracted, the structure suggests a phishing or malicious redirection attempt, potentially leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/strik?utm_term=the+economy+today+14th+edition In PDF document text
    • https://sabopedawexidix.weebly.com/uploads/1/3/4/3/134305122/zupizozixumisipovapu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_5f9e20288e537.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369660/normal_5f8f9098357eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375890/normal_5f8c7565314bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415962/normal_5f9ed18f34880.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503214/normal_5fac3c2ac21d8.pdfIn PDF document text
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/bda29608.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/jubiferekaka/47653142545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/762e5bae-ffc1-447d-a2e8-88602abadb9e/79649437545.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/inquisitor_build_pathfinder_kingmaker.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/imprimir_curp_por_internet_nuevo_formato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed15ce22-2840-4f96-9e49-37eb2741e231/52517707745.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/46693504852.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/browning_serial_numbers_hi_power.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/roblox_sound_ids_jojo.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_off0000bf34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF34 5064 bytes
SHA-256: 3bd607d17466e4af03a16d16e8cb2ff591fad966b2801555b9d62a0af4f40bdd
font_01_sfnt_off0000d059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD059 10012 bytes
SHA-256: b50f54eebc919d980448b790b207c504b790d6fc6b2e1febf402229d07016973

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