Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b5fe6a9b93cd6b…

MALICIOUS

PDF

82.6 KB Created: 2020-11-14 03:44:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e1e18c9187aa9ddb7ad96dc9d0dd4387 SHA-1: 15b51d8ab335ebbd3d3b040d85c10d53bab4f4fc SHA-256: 06b5fe6a9b93cd6b6befee50556e5518f6c382d74afd5c9d566f6f3611fae326
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector pointing to 'traffking.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were extracted, the presence of malicious links and the PDF structure suggest an attempt to redirect users to harmful content.

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://traffking.ru/strik?utm_term=conclusion+de+hoja+de+calculo In PDF document text
    • https://keboxatoxumire.weebly.com/uploads/1/3/4/5/134591907/1aff900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f874ae48967b.pdfIn PDF document text
    • https://jatilesaza.weebly.com/uploads/1/3/4/3/134316516/rireviziz.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/varolexexus/grandes_economistas_carlos_rodrguez_braun.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/bodyboss_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b76038a9-b89a-4cd8-8420-2d40a06f2864/round_table_pizza_fresno_california.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67bf9e76-f3db-463f-ab9f-9d310e868479/9481284580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b75c06d5-6553-48bc-b111-ae08792e6641/jufudotoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44e9b512-dcdb-42dc-b5f1-38c01a4b39ed/wiwiviwaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e121fe4a-9679-4195-9631-a00ec2712978/47784022648.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/dixuraxinoj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EA 13184 bytes
SHA-256: 420e959b56cbb628e597980e85ee9850f3f9dc12a96dec001698538d23afe5ca
font_01_sfnt_off0001036f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036F 4912 bytes
SHA-256: 792ea10fbded14d7c779c8afd6e6b3e4fbcc9d9de4f041558f4042fe1090a738
font_02_sfnt_off00011422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11422 12668 bytes
SHA-256: 0941fc310e9c744d0baf8256a0a70db353c37056baf17977ff22208adc3b429c

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