Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a92b0b025e3d6b…

MALICIOUS

PDF

72.7 KB Created: 2021-01-01 08:01:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8f7e474ad7beed80afe7a2470b428687 SHA-1: ece8e499b0006e837297e87c5f66252166ffe391 SHA-256: 01a92b0b025e3d6bc0e0a00a51ccaa0411095ae6455421fa2492d863283732ea
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest an attempt to redirect users to potentially harmful content.

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://trafftec.ru/wb?keyword=shadow%20of%20the%20dragon%20book PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5f89d953597f1.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/lunusixupugaduf_rezapijavagit_jidav.pdfIn PDF document text
    • https://lifesodoxeduze.weebly.com/uploads/1/3/4/3/134372712/15d17dcd857107e.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/WKRmhJF/offline_gps_app_for_iphone.pdfIn PDF document text
    • https://jazelisis.weebly.com/uploads/1/3/4/8/134870131/gimupudumerot.pdfIn PDF document text
    • https://jajesawi.weebly.com/uploads/1/3/0/8/130813829/b532f0872.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/19758842-52e0-437c-b594-d1c72fb108da/43354590270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/762b4c49-4431-4846-9e44-e84120878231/58395433852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93484772-4ace-4856-a65e-8004c3f57681/82735366463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28f310f8-a18b-4c75-abe8-a49c81cbb8e9/ruporunoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c3749a-ae45-484f-9361-86a72a104f2e/zesenofilosuniv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4515706c-7540-42e9-af6a-a1c6edc081e4/vobalewulotuzu.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_off0000dfc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC8 5356 bytes
SHA-256: 4afcec5a5deea2bd3aeeb1bbac16805f9efe3be994e89655a3b1b7616a116043
font_01_sfnt_off0000f211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF211 10696 bytes
SHA-256: d5a90c288bfb2a38c3934aa4bcc2653b316bbc5ca65ed084a8960affd923bb87

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