Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9931f7545599a5c…

MALICIOUS

PDF

61.0 KB Created: 2020-12-19 07:53:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 16dbc86b56be16019b557e61c8919b5b SHA-1: e46b90cc20bd4548ba65f7a3895712dde5e54c29 SHA-256: f9931f7545599a5c5db807c4f7090584e0f6597e2e621a60fcf15bf4ea82461c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF SEO link farm. One of the primary external URIs points to a suspicious domain, suggesting a potential phishing or malicious redirection attempt. The ClamAV detection and ML classifier further support the malicious nature of this document.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/strik?utm_term=honeywell+water+heater+5+flashes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454671/normal_5fd909786ffd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444853/normal_5fa1c8e14d0c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403563/normal_5f992aef348d7.pdfIn PDF document text
    • https://rivatekat.weebly.com/uploads/1/3/4/6/134626126/31f761d20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369507/normal_5f95544a5bd5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407070/normal_5fd3b4bc01f79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485704/normal_5fba1b38ca9a4.pdfIn PDF document text
    • https://febixitojujemo.weebly.com/uploads/1/3/4/4/134402622/3414206.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380675/normal_5fadd1ef67c65.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/verirejon/fofavilizalefobesobisu.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/49484436279.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6b028c6d96458364a8c4a/t/5fcbccda33fb14715cc4ede5/1607191774272/webimogan.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d156c89e1c4b8fe05cfa/t/5fd155a5071bbc688019d7f1/1607554469943/swot_analysis_examples_nursing.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB491 5132 bytes
SHA-256: 5f16c2be738b1f45fa3d1ce28bbc86914c9f2feed8cab5ed9e9d7d8cf5c08f6a
font_01_sfnt_off0000c61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC61F 9716 bytes
SHA-256: 8078de48af52b2edfceb584c767ae9323f465823f944de0b7e6af78a0084d66b

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