Malicious PDF — malware analysis report

Static analysis result for SHA-256 8264227442432c73…

MALICIOUS

PDF

65.6 KB Created: 2020-11-26 06:47:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1073af4987d6917693d904a875b9dd77 SHA-1: 6cf6edf6bc81b675f53b43fd1c46467f9ac208a7 SHA-256: 8264227442432c73db4b6d0ab4e00f8c0cd05883091f1715fc8ffc52657231d7
214 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of embedded URLs and the structure suggest an attempt to exploit user trust by masquerading as a legitimate document.

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://traffking.ru/strik?utm_term=rheem+ac+troubleshooting+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4479436/normal_5fb486a6a481d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5fb879ee938cd.pdfIn PDF document text
    • https://wivujawa.weebly.com/uploads/1/3/4/5/134582083/tugidozenixow-totawupubemufal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415530/normal_5fa70670cc86f.pdfIn PDF document text
    • https://devomejot.weebly.com/uploads/1/3/4/4/134491467/5221897.pdfIn PDF document text
    • https://dijaxoki.weebly.com/uploads/1/3/4/6/134666341/xesipidosalusap.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/3c2f6a6c-3def-45c6-8057-66603a192cb5/97653209936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdce0e91-4082-4688-9108-7b1df254c7f4/gift_wrap_cutter_michaels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c4c6159-465f-4e0f-8f64-aad6d6c88afa/5182089423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63695ec2-979a-4a6a-a358-126ed19264be/tokezurivekopobete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f0e4ef-26b6-4e06-b772-16d06bc2ebe5/xebinepupubefumovaram.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_off0000c563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC563 5500 bytes
SHA-256: 506a123171138cfb86ff94f621202f18f63f554bf2b142c45164c8579e331bd1
font_01_sfnt_off0000d7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E3 9876 bytes
SHA-256: e626e7747e3f7f4ea1674e62f579e04159eb6cdd915b3982f31d6489082f33a1

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