Malicious PDF — malware analysis report

Static analysis result for SHA-256 92effb13e9d9f8ad…

MALICIOUS

PDF

65.0 KB Created: 2020-12-17 18:30:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 75ac33567cc0c5758dd846f71f8e39fe SHA-1: cc6e29531e7b055c4a0a97a92d4519220ad865fd SHA-256: 92effb13e9d9f8ad4798dfe29733f508d98b8211719fae81cfa18275f53b2a44
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to a URL disguised with TGI Fridays-related search terms. This URL is flagged as malicious and is the primary indicator of compromise. The ML classifier and ClamAV detection strongly support the malicious nature of this file, suggesting it's a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://cctraff.ru/123?utm_term=tgi+fridays+miller+park+hours In 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/83c49943-baf1-4098-b6e3-b772e61d33f7/53270761403.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/slacker_radio_app_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/dnca_invest_miuri_fact_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/gukatejuledoru.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/29092388180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f29df71b-2da6-46b9-805e-4a674bfbdab3/pasilizidazosozelavapa.pdfIn PDF document text
    • https://s3.amazonaws.com/kimoweworape/tiwekirarubarix.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/how_to_channels_on_roku_3.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/lixanetivoxezazipesuje.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/dulezuwow.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/android_studio_background_color_codes.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_off0000c10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC10C 5572 bytes
SHA-256: d1018c0225e4e486e36c116159e17c2c1a428979663124608eabaed464d745ec
font_01_sfnt_off0000d3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E1 10528 bytes
SHA-256: 605e52926f2cb25bc8b81435ed337c10b636ea75605edbadc32b9b35cba3f243

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