Malicious PDF — malware analysis report

Static analysis result for SHA-256 4354e81b7dbe1081…

MALICIOUS

PDF

73.2 KB Created: 2020-12-02 11:04:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ca23ad3c49d1b42477bd042f84d7020a SHA-1: 1a0851eeea3123c54954821b2b1e9e8d3338873d SHA-256: 4354e81b7dbe1081c08d41a553e0a5c471f6b25576dfa0e242c1c921756036c5
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=ad+hoc+reporting+in+tableau+server In PDF document text
    • https://cdn-cms.f-static.net/uploads/4527357/normal_5fbea38f13d0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427293/normal_5fb2cef47b802.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0b5bec30a162e0c519083/t/5fc38bec3c02f22b9d7ac076/1606650862216/57716200421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3430d2a7-5c21-477b-b81a-df5c1e9cb2c4/nepoxezadimuxamomeri.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea1940f1034a5ca8ddc5/t/5fc54cce18e72e5fdb86f161/1606765774671/gathering_blue_study_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1210ec89e1c4b8fbfc3b6/t/5fc611d2f81c9a2a0c737774/1606816210404/vubovowo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf74f8cb11b25c09b74c2/1606219599632/23317901529.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd024964a3cc4058a5589e/1606222411313/lemofufejipawujob.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf4ea3c02f22b9dd2b6ca/1606284523321/dubamojigijoxuxifimomage.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe14893c6ccf69f3268983/1606292618944/nested_if_statements_python_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/351cb1ee-f1e1-4178-8ff3-7630494b7da0/mor-flo_water_heater_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce857112-fb2c-4cf4-b125-ad86dd600ac3/scarlett_johansson_brain.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 2

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_off0000df7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7E 5524 bytes
SHA-256: 8ec4c1c8e2a84299ea0fc080fd92f0decc646f1b35427eab32628187de4fa6b7
font_01_sfnt_off0000f243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF243 11068 bytes
SHA-256: c0572019e4bdb01a2a899daaa66e64059260120e801ba93fd5ce11e9160f9cf7

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