Malicious PDF — malware analysis report

Static analysis result for SHA-256 9914ed733fe0351a…

MALICIOUS

PDF

79.9 KB Created: 2020-11-13 07:18:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1e936e2d44fa2e1c97663aad45b01bad SHA-1: 8d0d6c0f866116737022b2d75b0edb9a69be4fa1 SHA-256: 9914ed733fe0351a8b98cff4923e81c8cf651416dc9e04affbeadb20e2f7a0bf
214 Risk Score

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 URLs, suggesting a link farm or phishing attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=response+to+stimuli+examples In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385852/normal_5f99bbf0701b4.pdfIn PDF document text
    • https://nopubogap.weebly.com/uploads/1/3/4/6/134667077/5a915afe516d.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/06948e3e-d832-44d9-a7f8-c4083727f776/10905117605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1517afe9-21a7-4acf-83eb-4c1ddb266105/88856362681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffb25094-27e9-4f9d-ad96-7519994b351f/72906881940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af93801c-a2bb-4695-ac01-480d7c1971a9/66568143018.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/36891517546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48354d07-9461-440b-b88e-7abe9b42b65e/viletimovoxepatekenupit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65926db8-70d8-4d5f-8bf5-2f4b3a8c697c/sarejaredutulosat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/325ddf4c-15ca-48bb-9605-4a3aa460d48b/53041425241.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_off0001001c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001C 4944 bytes
SHA-256: 0f1813f88d208c82e052144312ad89c8b93f81df1f2bc16071e05249771e3504
font_01_sfnt_off000110e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E6 10088 bytes
SHA-256: a1712d7b2488c8aab4d63bcafc8f11fa6fc662942c4e4bb9f3fc49a7c28e4c90

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