Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd8e6b1bf4171f4…

MALICIOUS

PDF

70.0 KB Created: 2021-01-02 12:58:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e366f673f4a0d8c87c36b49197f3938d SHA-1: c9fa48dd7fab138db1f8ad1d086fbb8daebf9a19 SHA-256: cdd8e6b1bf4171f48bc8762fb5afb892fe87e338cf40f60fbfb2815ec935c998
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector and a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious 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
  • 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://traffmen.ru/aws?utm_term=fundsmith+equity+income+fund+factsheet In PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/c5284180e0d59.pdfIn PDF document text
    • https://vutuwoti.weebly.com/uploads/1/3/4/7/134720014/1752416.pdfIn PDF document text
    • https://rigawegafo.weebly.com/uploads/1/3/4/5/134587157/164281.pdfIn PDF document text
    • https://vadazexo.weebly.com/uploads/1/3/4/6/134646317/gisoxaziparovigajaga.pdfIn PDF document text
    • https://vigodabazo.weebly.com/uploads/1/3/4/8/134872933/9b6d78.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/9a2575c7-6efd-4ed1-9329-9343fed206e1/moto_z_play_root.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/sugonegasasagate.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/nulati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c665618-7388-4dd3-8a06-efa18ff8e6cf/selmers_night_in_the_woods.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/80363263282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a679f92e-f9fe-4b08-89aa-fb724332e27a/80114651838.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_off0000d41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41D 5316 bytes
SHA-256: 8bf5761edf4d78e13981a9baf1b3324c19f1fcbcc7fd37108398e1263e916a2b
font_01_sfnt_off0000e618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE618 11032 bytes
SHA-256: 5a091d70bb835b6e34dcbe2d70c94f3e1cbc1508faea8e575e4897aad5ac6f88

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