Malicious PDF — malware analysis report

Static analysis result for SHA-256 30ee07dbf75eb1cd…

MALICIOUS

PDF

67.5 KB Created: 2020-11-18 00:18:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: af3745bc1aebb8b8cd6ea3739b51f05a SHA-1: e4c2d188f973d057d703452e989501afb0bb6f0b SHA-256: 30ee07dbf75eb1cd89e184a4d50755f5a210e6c7d95c852248bd549b29cce54d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 ClamAV detection and an ML classifier indicating a high probability of maliciousness. The PDF contains a large number of external links, many of which are SEO-spam related, and one primary URL that appears to be part of a traffic-driving scheme. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics suggest it is designed to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/123?utm_term=anatomia+y+fisiologia+humana+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5fa90bdabbd45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391954/normal_5faeedf3400e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390996/normal_5fb2b1253d633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f8c792735b66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422168/normal_5fad931b67de9.pdfIn PDF document text
    • https://xovifare.weebly.com/uploads/1/3/4/5/134524114/dudesazufu.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/mijedusovineti/15499297103.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/husqvarna_manual_18542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea4b99b6-8996-42c7-930c-b4412bef02d8/siding_removal_tool_lowes.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/28845734298.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/61207271129.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_off0000ca44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA44 5452 bytes
SHA-256: bd0f9ed07c167b97a10c31d6f1da3619baa1df4784586261f15609fdf3418b56
font_01_sfnt_off0000dcb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB9 11440 bytes
SHA-256: b9d679c280d4a3330ca83b35bb7e0d4f00a215f5ffd3f29c99214d0cfd12003a

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