Malicious PDF — malware analysis report

Static analysis result for SHA-256 39365f37c5bc7e19…

MALICIOUS

PDF

71.6 KB Created: 2020-11-18 19:31:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 478e2f4667c1fc55df60a05bea364dc0 SHA-1: d983dd8b52503724b0852585fa1dbca3b159be47 SHA-256: 39365f37c5bc7e19722fcf246c2d4464006bcc363bf84dd9f68a851a97b3cf47
154 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/123?utm_term=maria+de+jorge+isaacs+pdf In PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/mezegaliza-mimet-gukilomodekaje-vaxibopekexiti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369514/normal_5f8fb13c225e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383471/normal_5f8bd1d1c5670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386591/normal_5f8f968adfa9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5fa36e9ae6964.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/d8d72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367923/normal_5f8b787323bfe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9ed27f7b-07f2-49bf-8ac9-c2d83cec92b6/biodata_form_philippines_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b07a16d0-2a12-4974-be63-91fd1197d458/82946107195.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/14217446935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e158a0c-d641-4864-89b5-f79db3a577fa/18202700565.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/verizon_wireless_orbic_journey_v_user_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC8 4972 bytes
SHA-256: d02244066728b97845a4a4b85cc6a851367c89c2ab7fba8c1c54fe898969d7ad
font_01_sfnt_off0000ddcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCC 11608 bytes
SHA-256: 230ef5e25220e008b6babe1321c63e227140ab6773d534c11342bbf77c711e32
font_02_sfnt_off00010389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10389 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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